
Broken Coffin - NA
Set's pretty flexible with builds because of his base damage, scaling, passive and ult. So there are multiple ways of building him. You can go either ability or auto attack based, build him full tank, full damage, bruiser, etc.
Though I feel like the best way to play him right now is ability based and bruiser.
Because of this he works in the Solo Lane and the Jungle.
You can start with Warding Sigil, Bluestone Pendant or Tainted Steel if they have a lot of healers. However I think Warrior's Axe is still the best option right now.

Warrior's Axe
PASSIVE - Damaging an enemy god steals 20 health (+1.5 per level) away from your target and restores 20 mana. This effect can only occur once every 10s. Can be upgraded at level 20.

Cudgel

Healing Potion
This consumable heals 250 Health over 25 seconds.

Multi Potion
This consumable heals 125 Health and 75 Mana over 25 seconds.

Purification Beads
Using this item removes Crowd Control Effects and makes you immune to new ones for 2s. Cooldown - 170s.
Solo lane is all about counter building so your build will drastically change depending on your match and who you are against.
Jotunn's Vigor is crazy on Set because of his passive and ult, so you should definitely abuse it.

Sundering Axe
PASSIVE - Damaging an enemy god steals 2% (+2% of your Protection from items) of their Current Health away from your target and restores it to you. This effect can only occur once every 10s.

Jotunn's Vigor
GLYPH - If you drop beneath 40% health, gain 10% Movement Speed and 30% Physical Ability Lifesteal for 5s. This effect may only occur once every 15s.

Berserker's Shield
PASSIVE - Can only be built by Assassins or Warriors. While below 40% Health you become Berserk for 5s. Berserk provides 7% Damage Mitigation. Can only occur once every 15 seconds.

Shogun's Kusari
AURA - Allied gods within 70 units have their Attack Speed increased by 30%.

Mantle of Discord
PASSIVE - If you take damage below 30% health you unleash a shockwave that stuns all enemies within a range of 20 units for 1s and become immune to Crowd Control for 1s. This effect cannot trigger more than once every 110s.

Serrated Edge
PASSIVE - For every non-ultimate ability on cooldown you gain a stack of Cruelty. Each stack provides 8 Physical Power and 3% Physical Lifesteal.

Chalice of Healing
This consumable heals 250 Health over 25 seconds per use. Comes with 3 uses that are refilled if you enter the Fountain, sells for 0 gold.

Temporal Beads
Using this item removes Crowd Control Effects and makes you immune to new ones for 2s. Additionally, your active cooldowns are reduced by 3s on use. Cooldown - 140s.

Thorns of Sapping Strength
Using this item reflects 35% of all damage you take, before mitigations, for the next 3 seconds, back to its owner as Magical Damage. If you are dealt 120 * your level damage while this effect is active, the effect will end early. While this is active enemies can only lifesteal from you for 75% of their total lifesteal. Each basic attack from enemy gods reduces the cooldown of this item by 0.5s. Cooldown - 80s.
Here are some items that you could fit on your build depending on your needs.

Bumba's Spear
PASSIVE - Your Basic Attacks deal +50 True Damage and your Abilities deal +35% damage against Jungle Camps, Structures, and Jungle Bosses. When any of these die you gain a 10% power buff for 30s and are healed for 10% of their Health, 10% of your Mana.

Bumba's Hammer
PASSIVE - After casting an ability your next Basic Attack deals an additional 80 True Damage. After hitting a Basic Attack empowered by Bumba’s Hammer, your active cooldowns are reduced by 1s and you are healed for 5% of your Maximum Health.

Protector of the Jungle
PASSIVE - While in the jungle you gain 15% Power and 12% Protections.

Manikin Mace
PASSIVE - Enemies hit by your Basic Attacks are burned, taking 60 physical damage over 2s and have their Attack Speed slowed by 10%. Jungle Monsters and Bosses take 4x damage and restore 3% Health and 5% Mana when they die if they are burned. This effect can stack up to 4 times.

Infused Sigil
PASSIVE - When you are hit by an ability the Infused Sigil gains a stack. This can occur only once per ability cast. At 4 stacks it explodes after 0.5s, dealing 600 Physical Damage to enemies within 30 units of you.

Sigil of The Old Guard
PASSIVE - You gain 5% Damage Mitigation. Whenever you are hit by an ability you gain a stack of Rebuke, providing an additional 4% Damage Mitigation for 8s. This occurs only once per ability cast. This can stack up to three times.

Animosity
PASSIVE - Your Basic Attacks deal bonus damage equal to 3% of your Maximum Health as Magical Damage to enemies and structures.
If you plan on going with Animosity (which mind you isn't really a great option right now), you should fully buy it when you hit level 17. Please don't buy Benevolence, it will only put you behind.

Jotunn's Vigor
GLYPH - If you drop beneath 40% health, gain 10% Movement Speed and 30% Physical Ability Lifesteal for 5s. This effect may only occur once every 15s.

Evolved Transcendence
PASSIVE - 3% of your Mana is converted to Physical Power.

The Crusher
PASSIVE - Enemies hit by your damaging Abilities take an additional 20 Physical Damage + 15% of your Physical Power over 2s.

Evolved Soul Eater
PASSIVE - Your abilities heal you for 25% of the damage dealt to targets.

Hydra's Lament
PASSIVE - For 8s after using an ability, your next Basic Attack will deal an additional 35% damage. Abilities that function like basic attacks do not benefit from this. PASSIVE - This item grants 2.5 MP5 per 10% of your missing Mana.

Serrated Edge
PASSIVE - For every non-ultimate ability on cooldown you gain a stack of Cruelty. Each stack provides 8 Physical Power and 3% Physical Lifesteal.

Heartseeker
PASSIVE - Your abilities deal an additional 3% of the targets maximum Health as Physical Damage. If you have over 200 Physical Power, your ability bonus damage scales up. This effect reaches a maximum of 6% Maximum Health damage at 400 Physical Power. Subsequent hits on the same target do 75% bonus damage for the next 3s.

Tainted Amulet
PASSIVE - Enemy Gods that you hit have their healing taken reduced by 30% for 6s. You are healed for 100% of the healing reduced.

Tainted Breastplate
PASSIVE - Enemy gods that you hit have their healing taken reduced by 50% for 8s.

Brawler's Beat Stick
PASSIVE - Enemies hit by your Abilities have 40% reduced healing for 6 seconds.

Toxic Blade
PASSIVE - Enemies hit by your basic attacks gain 20% reduced healing, stacking up to 3 times and lasting 6s.

Contagion
AURA - Enemy gods within 55 units have their healing reduced by 25%. This does not stack with similar Auras.

Pestilence
AURA - Enemy gods within 55 units have their healing reduced by 25%. This does not stack with similar Auras.

Berserker's Shield
PASSIVE - Can only be built by Assassins or Warriors. While below 40% Health you become Berserk for 5s. Berserk provides 7% Damage Mitigation. Can only occur once every 15 seconds.

Shifter's Shield
PASSIVE - While over 75% Health, you gain +30 Physical Power. While under 75% Health, you gain +40 Protections.

Void Shield
AURA - Enemy gods within 55 units have their Physical Protection reduced by 15%.

Breastplate of Determination
GLYPH - Each time you are hit by an ability, gain a stack of 5 Protections that corresponds to the damage type you were hit with, up to a max of 4 of each type. Once you reach max stacks of both kinds, gain a burst of 20% Movement Speed and double your Protections gained by this effect for 8s, after which all stacks are removed.

Breastplate of Vigilance
GLYPH - When your ultimate ability has finished casting you provide an aura in a 40 unit range around you reducing basic attack damage from enemies by 15% for 5s. This effect may only occur once every 45s.

Spectral Armor
PASSIVE - Physical Critical Strikes bonus damage taken is decreased by 30%.

Hide of the Nemean Lion
PASSIVE - Every 10 seconds you gain a block stack if you have at least 80 total Protections from items and abilities, preventing 50% of the next Basic Attack's damage. For each additional 80 total Protections from items and abilities the max. stacks increases, up to a cap of 3.

Witchblade
AURA - Enemies within 55 units have their Attack Speed reduced by 25%.

Caduceus Shield
AURA - Allied gods within 70 units have their Healing increased by 20%.

Shogun's Kusari
AURA - Allied gods within 70 units have their Attack Speed increased by 30%.

Ancile
PASSIVE - Whenever you take Magical Damage from an enemy ability you unleash a shockwave that Silences all enemies within a range of 30 units for 1s. This effect cannot trigger more than once every 30s.

Runic Shield
AURA - Enemy gods within 55 units have their Magical Power reduced by 40.

Talisman of Energy
PASSIVE - Getting a kill or assist on enemies causes you and allies within 70 units to gain stacks of energy. Energy stacks provide 2% Movement Speed, 2% Attack Speed, and 10MP5 per stack. Lasts 10s and stacks up to 6 times.

Bulwark of Hope
PASSIVE - When you take damage and are below 40% Health, you gain a Shield with health equal to 12% of your Maximum Health for 20s. Can only occur once every 60s.

Frostbound Hammer
PASSIVE - Enemies hit by your Basic Attacks have their Movement Speed reduced by 25% (15% for Ranged Basic Attacks) and have their Attack Speed reduced 20% for 1.25 seconds.

Runeforged Hammer
PASSIVE - Enemies take 20% increased damage from you if they are affected by Crowd Control. Does not include Knockbacks, Blinds, or Grabs.

Mantle of Discord
PASSIVE - If you take damage below 30% health you unleash a shockwave that stuns all enemies within a range of 20 units for 1s and become immune to Crowd Control for 1s. This effect cannot trigger more than once every 110s.

Evolved Hide of the Urchin
PASSIVE - Provides a Health Shield that gains stacks every 2s. Shield only stacks if you have not taken or dealt damage in the last 5s. Each stack provides 10% of 100 Health +5 Per Level. The full shield will regenerate after 20 seconds.

Spirit Robe
PASSIVE - You gain an additional 15% Damage Mitigation for 3s whenever you are hit with a hard Crowd Control Effect or Root. This can only occur once every 15 seconds.

Magi's Cloak
PASSIVE - Protects you from a single hard Crowd Control effect or Root once every 70 seconds. When this occurs, you gain 1s of Crowd Control immunity.

Fortifying Shell
Using this item applies a shield to yourself and allies within 35 units for 100 Health + 12 Health per God Level for 3 seconds. Additionally, all allies take 40% reduced damage from Basic Attacks while the shield is active. When the shield is broken or expires, Allied Gods gain a new buff providing 15% Damage Mitigation and 20% Movement Speed for 3s. Cooldown - 130s.

Cloak of the Ascetic
Using this item causes you to Enter a meditative state where nearby allies gods within 35 units restore 30 + 4% of their missing health and mana each pulse. Additionally each pulse reduces cooldowns for all abilities by 1.5s. Pulses occur once every second for 4s. Cooldown - 130s.

Emblem of Increasing Peril
Using this item Slows the Movement Speed of all enemy gods within 35 units by 30% for 5s. Their Attack Speed is reduced by 25% for the duration. Additionally, their Damage Dealt is reduced by 15%. If an enemy deals 10% of an Allied God's Maximum Health within the duration, the debuff's effects are increased by 10% each, stacking up to 3 times. Cooldown - 110s.

Entangling Wings
Using this item increases the Movement Speed of allied gods within 55 units by 20% for 5s and makes them immune to Slows. On use, this Relic also Roots Enemies in the area for 1s. Cooldown - 110s

Sundering Siphon
Fire a bolt that travels 50 units, stopping on first god hit, reducing any active shields by 75%, and linking them to you. For the next 4s, they are dealt 5% of their Current Health as True Damage every second, and you receive half that amount as healing. Enemies can break the link if they move 60 units away from you. This relic has 2 charges. A second hit on the same target will just refresh the duration. Cooldown - 110s.

Blighted Ankh
Using this item reduces the Healing received by all enemy gods within 55 units by 60% for 10s and removes 75% of any currently applied shield. Enemies that are healed by god abilities while affected by this curse take 20% more damage from all sources for the duration of the curse. All healing reduced by this effect is instead distributed to your allies in a 40 unit radius around you. Cooldown - 100s.

Belt of the Berserker
Using this item grants all allied gods within 70 units 20% Increased Damage dealt to all targets, including objectives, and 40% Attack Speed increase, decaying every 0.5s for 6 seconds. Cooldown - 110s.
You can go with any of these relics if you'd like though I recommend more the Beads and Thorns that are in the original build.
You can start with Eye of the Jungle since it's pretty op right now or even go for the Manikin Scepter. But personally I prefer the Bumba's Dagger.

Bumba's Dagger
PASSIVE - Your Basic Attacks deal +25 True Damage and your Abilities deal +35% Damage versus Jungle Monsters. When a Jungle Monster is killed you are restored for 10% of the Monster's Health and 25 Mana. Can be upgraded at level 20.

Mace

Healing Potion
This consumable heals 250 Health over 25 seconds.

Hand of the Gods
This consumable deals 200 True damage to Jungle Monsters around you. This only affects Monsters on your side of the Jungle.

Purification Beads
Using this item removes Crowd Control Effects and makes you immune to new ones for 2s. Cooldown - 170s.
For your final build you can go with any upgrade of Bumba's Spear or Eye of the Jungle. If you started with Manikin Scepter you should upgrade it to Manikin Mace, the other upgrade won't do much for you.
For your relics you should go for Beads and Aegis. You could change the Aegis with a Blink but I don't believe that it's worth it with Set.

Protector of the Jungle
PASSIVE - While in the jungle you gain 15% Power and 12% Protections.

Jotunn's Vigor
GLYPH - If you drop beneath 40% health, gain 10% Movement Speed and 30% Physical Ability Lifesteal for 5s. This effect may only occur once every 15s.

Evolved Soul Eater
PASSIVE - Your abilities heal you for 25% of the damage dealt to targets.

Berserker's Shield
PASSIVE - Can only be built by Assassins or Warriors. While below 40% Health you become Berserk for 5s. Berserk provides 7% Damage Mitigation. Can only occur once every 15 seconds.

Shogun's Kusari
AURA - Allied gods within 70 units have their Attack Speed increased by 30%.

Serrated Edge
PASSIVE - For every non-ultimate ability on cooldown you gain a stack of Cruelty. Each stack provides 8 Physical Power and 3% Physical Lifesteal.

Temporal Beads
Using this item removes Crowd Control Effects and makes you immune to new ones for 2s. Additionally, your active cooldowns are reduced by 3s on use. Cooldown - 140s.

Aegis of Judgement
Using this item makes you invulnerable to damage and healing for 1.5s, and prevents you from taking any actions. You may still move. At the end of the invulnerability, you explode dealing 100 + 50% of the Prevented Damage as Magical Damage in a 30 unit radius. The damage dealt by this effect is capped at 20% of the enemies' Maximum Health. Cooldown - 140s.

Bumba's Spear
PASSIVE - Your Basic Attacks deal +50 True Damage and your Abilities deal +35% damage against Jungle Camps, Structures, and Jungle Bosses. When any of these die you gain a 10% power buff for 30s and are healed for 10% of their Health, 10% of your Mana.

Jotunn's Vigor
GLYPH - If you drop beneath 40% health, gain 10% Movement Speed and 30% Physical Ability Lifesteal for 5s. This effect may only occur once every 15s.

Runeforged Hammer
PASSIVE - Enemies take 20% increased damage from you if they are affected by Crowd Control. Does not include Knockbacks, Blinds, or Grabs.

Caduceus Shield
AURA - Allied gods within 70 units have their Healing increased by 20%.

Heartseeker
PASSIVE - Your abilities deal an additional 3% of the targets maximum Health as Physical Damage. If you have over 200 Physical Power, your ability bonus damage scales up. This effect reaches a maximum of 6% Maximum Health damage at 400 Physical Power. Subsequent hits on the same target do 75% bonus damage for the next 3s.

Mantle of Discord
PASSIVE - If you take damage below 30% health you unleash a shockwave that stuns all enemies within a range of 20 units for 1s and become immune to Crowd Control for 1s. This effect cannot trigger more than once every 110s.

Temporal Beads
Using this item removes Crowd Control Effects and makes you immune to new ones for 2s. Additionally, your active cooldowns are reduced by 3s on use. Cooldown - 140s.

Aegis of Judgement
Using this item makes you invulnerable to damage and healing for 1.5s, and prevents you from taking any actions. You may still move. At the end of the invulnerability, you explode dealing 100 + 50% of the Prevented Damage as Magical Damage in a 30 unit radius. The damage dealt by this effect is capped at 20% of the enemies' Maximum Health. Cooldown - 140s.

Bumba's Spear
PASSIVE - Your Basic Attacks deal +50 True Damage and your Abilities deal +35% damage against Jungle Camps, Structures, and Jungle Bosses. When any of these die you gain a 10% power buff for 30s and are healed for 10% of their Health, 10% of your Mana.

Jotunn's Vigor
GLYPH - If you drop beneath 40% health, gain 10% Movement Speed and 30% Physical Ability Lifesteal for 5s. This effect may only occur once every 15s.

Hydra's Lament
PASSIVE - For 8s after using an ability, your next Basic Attack will deal an additional 35% damage. Abilities that function like basic attacks do not benefit from this. PASSIVE - This item grants 2.5 MP5 per 10% of your missing Mana.

The Crusher
PASSIVE - Enemies hit by your damaging Abilities take an additional 20 Physical Damage + 15% of your Physical Power over 2s.

Serrated Edge
PASSIVE - For every non-ultimate ability on cooldown you gain a stack of Cruelty. Each stack provides 8 Physical Power and 3% Physical Lifesteal.

Heartseeker
PASSIVE - Your abilities deal an additional 3% of the targets maximum Health as Physical Damage. If you have over 200 Physical Power, your ability bonus damage scales up. This effect reaches a maximum of 6% Maximum Health damage at 400 Physical Power. Subsequent hits on the same target do 75% bonus damage for the next 3s.

Temporal Beads
Using this item removes Crowd Control Effects and makes you immune to new ones for 2s. Additionally, your active cooldowns are reduced by 3s on use. Cooldown - 140s.

Aegis of Judgement
Using this item makes you invulnerable to damage and healing for 1.5s, and prevents you from taking any actions. You may still move. At the end of the invulnerability, you explode dealing 100 + 50% of the Prevented Damage as Magical Damage in a 30 unit radius. The damage dealt by this effect is capped at 20% of the enemies' Maximum Health. Cooldown - 140s.

Bumba's Hammer
PASSIVE - After casting an ability your next Basic Attack deals an additional 80 True Damage. After hitting a Basic Attack empowered by Bumba’s Hammer, your active cooldowns are reduced by 1s and you are healed for 5% of your Maximum Health.

The Crusher
PASSIVE - Enemies hit by your damaging Abilities take an additional 20 Physical Damage + 15% of your Physical Power over 2s.

Hydra's Lament
PASSIVE - For 8s after using an ability, your next Basic Attack will deal an additional 35% damage. Abilities that function like basic attacks do not benefit from this. PASSIVE - This item grants 2.5 MP5 per 10% of your missing Mana.

Serrated Edge
PASSIVE - For every non-ultimate ability on cooldown you gain a stack of Cruelty. Each stack provides 8 Physical Power and 3% Physical Lifesteal.

Heartseeker
PASSIVE - Your abilities deal an additional 3% of the targets maximum Health as Physical Damage. If you have over 200 Physical Power, your ability bonus damage scales up. This effect reaches a maximum of 6% Maximum Health damage at 400 Physical Power. Subsequent hits on the same target do 75% bonus damage for the next 3s.

Mantle of Discord
PASSIVE - If you take damage below 30% health you unleash a shockwave that stuns all enemies within a range of 20 units for 1s and become immune to Crowd Control for 1s. This effect cannot trigger more than once every 110s.

Temporal Beads
Using this item removes Crowd Control Effects and makes you immune to new ones for 2s. Additionally, your active cooldowns are reduced by 3s on use. Cooldown - 140s.

Aegis of Judgement
Using this item makes you invulnerable to damage and healing for 1.5s, and prevents you from taking any actions. You may still move. At the end of the invulnerability, you explode dealing 100 + 50% of the Prevented Damage as Magical Damage in a 30 unit radius. The damage dealt by this effect is capped at 20% of the enemies' Maximum Health. Cooldown - 140s.
Here are some items that could fit on your build according to your match.

Bumba's Spear
PASSIVE - Your Basic Attacks deal +50 True Damage and your Abilities deal +35% damage against Jungle Camps, Structures, and Jungle Bosses. When any of these die you gain a 10% power buff for 30s and are healed for 10% of their Health, 10% of your Mana.

Bumba's Hammer
PASSIVE - After casting an ability your next Basic Attack deals an additional 80 True Damage. After hitting a Basic Attack empowered by Bumba’s Hammer, your active cooldowns are reduced by 1s and you are healed for 5% of your Maximum Health.

Protector of the Jungle
PASSIVE - While in the jungle you gain 15% Power and 12% Protections.

Seer of the Jungle
PASSIVE - You deal 35% increased damage to Jungle Monsters and Jungle Bosses. Upon defeating a Large Jungle Monster or Jungle Boss, you gain the ability to see wards for 30s.

Manikin Mace
PASSIVE - Enemies hit by your Basic Attacks are burned, taking 60 physical damage over 2s and have their Attack Speed slowed by 10%. Jungle Monsters and Bosses take 4x damage and restore 3% Health and 5% Mana when they die if they are burned. This effect can stack up to 4 times.

Jotunn's Vigor
GLYPH - If you drop beneath 40% health, gain 10% Movement Speed and 30% Physical Ability Lifesteal for 5s. This effect may only occur once every 15s.

Evolved Transcendence
PASSIVE - 3% of your Mana is converted to Physical Power.

Evolved Soul Eater
PASSIVE - Your abilities heal you for 25% of the damage dealt to targets.

Brawler's Beat Stick
PASSIVE - Enemies hit by your Abilities have 40% reduced healing for 6 seconds.

Heartseeker
PASSIVE - Your abilities deal an additional 3% of the targets maximum Health as Physical Damage. If you have over 200 Physical Power, your ability bonus damage scales up. This effect reaches a maximum of 6% Maximum Health damage at 400 Physical Power. Subsequent hits on the same target do 75% bonus damage for the next 3s.

Serrated Edge
PASSIVE - For every non-ultimate ability on cooldown you gain a stack of Cruelty. Each stack provides 8 Physical Power and 3% Physical Lifesteal.

Toxic Blade
PASSIVE - Enemies hit by your basic attacks gain 20% reduced healing, stacking up to 3 times and lasting 6s.

Qin's Sais
PASSIVE - On Basic Attack hits, deal Physical Damage equal to 3% of the target's maximum Health. If the target has over 2250 Health, the bonus damage scales up. This effect reaches a maximum of 5% of the targets Maximum Health at 3000 Health.

Stone Cutting Sword
PASSIVE - Melee Basic Attacks decreases enemy Physical protections by 7, and increase your physical protection by 5 for 3s (max. 3 Stacks).

Silverbranch Bow
PASSIVE - For each 0.02 Attack Speed you go over cap you gain 2 Physical Power.

Berserker's Shield
PASSIVE - Can only be built by Assassins or Warriors. While below 40% Health you become Berserk for 5s. Berserk provides 7% Damage Mitigation. Can only occur once every 15 seconds.

Shifter's Shield
PASSIVE - While over 75% Health, you gain +30 Physical Power. While under 75% Health, you gain +40 Protections.

Void Shield
AURA - Enemy gods within 55 units have their Physical Protection reduced by 15%.

Caduceus Shield
AURA - Allied gods within 70 units have their Healing increased by 20%.

Shogun's Kusari
AURA - Allied gods within 70 units have their Attack Speed increased by 30%.

Mantle of Discord
PASSIVE - If you take damage below 30% health you unleash a shockwave that stuns all enemies within a range of 20 units for 1s and become immune to Crowd Control for 1s. This effect cannot trigger more than once every 110s.

Spirit Robe
PASSIVE - You gain an additional 15% Damage Mitigation for 3s whenever you are hit with a hard Crowd Control Effect or Root. This can only occur once every 15 seconds.

Magi's Cloak
PASSIVE - Protects you from a single hard Crowd Control effect or Root once every 70 seconds. When this occurs, you gain 1s of Crowd Control immunity.

Thorns of Sapping Strength
Using this item reflects 35% of all damage you take, before mitigations, for the next 3 seconds, back to its owner as Magical Damage. If you are dealt 120 * your level damage while this effect is active, the effect will end early. While this is active enemies can only lifesteal from you for 75% of their total lifesteal. Each basic attack from enemy gods reduces the cooldown of this item by 0.5s. Cooldown - 80s.

Entangling Wings
Using this item increases the Movement Speed of allied gods within 55 units by 20% for 5s and makes them immune to Slows. On use, this Relic also Roots Enemies in the area for 1s. Cooldown - 110s

Fortifying Shell
Using this item applies a shield to yourself and allies within 35 units for 100 Health + 12 Health per God Level for 3 seconds. Additionally, all allies take 40% reduced damage from Basic Attacks while the shield is active. When the shield is broken or expires, Allied Gods gain a new buff providing 15% Damage Mitigation and 20% Movement Speed for 3s. Cooldown - 130s.

Sundering Siphon
Fire a bolt that travels 50 units, stopping on first god hit, reducing any active shields by 75%, and linking them to you. For the next 4s, they are dealt 5% of their Current Health as True Damage every second, and you receive half that amount as healing. Enemies can break the link if they move 60 units away from you. This relic has 2 charges. A second hit on the same target will just refresh the duration. Cooldown - 110s.

Emblem of Increasing Peril
Using this item Slows the Movement Speed of all enemy gods within 35 units by 30% for 5s. Their Attack Speed is reduced by 25% for the duration. Additionally, their Damage Dealt is reduced by 15%. If an enemy deals 10% of an Allied God's Maximum Health within the duration, the debuff's effects are increased by 10% each, stacking up to 3 times. Cooldown - 110s.

Corrupted Blink Rune
Using this item will allow you to teleport up to 45 units away instantly. This item can not be used if you have taken or dealt damage in the last 3s. On teleporting, slow all enemies’ Movement Speed and Attack Speed by 15% within a 25 unit radius for 2.5s. Cooldown - 120s.

Blighted Ankh
Using this item reduces the Healing received by all enemy gods within 55 units by 60% for 10s and removes 75% of any currently applied shield. Enemies that are healed by god abilities while affected by this curse take 20% more damage from all sources for the duration of the curse. All healing reduced by this effect is instead distributed to your allies in a 40 unit radius around you. Cooldown - 100s.
Here are some relics that you could use, although I recommend more the Beads and Aegis if you're the jungler.
Duel's all about counter building, even more so than solo lane, so your build's will change drastically with every match up.
For your starter item you can go with Bumba's Dagger, Eye of the Jungle, Tainted Steel, Warrior's Axe and even Warding Sigil. However I find Manikin Scepter to be the most useful.
When it comes to your 1st relic you could go with Magic Shell, Cloak of Meditation or Beads if you want a defensive relic which to be honest is probably your best choice. However you could also go with a Horrific Emblem if you want to cheese the first blood.

Manikin Scepter
PASSIVE - Enemies hit by your Basic Attacks are burned, taking 16 Physical Damage (+5% of your Physical and Magical Power) over 2s and have their Attack Speed reduced by 4.5%. Jungle Monsters take 4x the amount of damage and restore 3% Health and 5% Mana when they die if they are burned. This effect can stack up to 3 times. Can be upgraded at level 20.

Mace

Healing Potion
This consumable heals 250 Health over 25 seconds.

Magic Shell
Using this item applies a shield to yourself and allies within 35 units for 100 Health + 12 Health per God Level for 3 seconds. Additionally, all allies take 20% reduced damage from Basic Attacks while the shield is active. Cooldown - 150s.
Your final build will change a lot according to your match, but I find this build to be pretty good.
For your 1st item you could go for a crusher since it's really nice with Set, but I find Jotunn's Vigor to be almost core to every Set build since it works wonders with your ult and passive. You could also start with Transcendence if you'd like to.
Soul Eater is kind of risky since they will or at least should build antiheal against you regardless of your build just because of your ult, but if you can get away with it then it will feel really nice. Though if you really aren't feeling the Soul Eater you could change it for a Hydra's Lament.
If your opponent has a lot of healing like for example a Hades obviously you should buy a Brawler's Beat Stick, keep your Toxic Blade and maybe even buying a Cursed Ankh for your 2nd relic.
If your opponent isn't really that tanky you should change Serrated Edge for Heartseeker.
Lastly when it comes to your relics I'd recommend starting with either Magic Shell or Cloak of Meditation and finishing with a Thorns, Horrific Emblem, Purification Beads or Heavenly Wings. Though every thing depends on your situation.

Manikin Mace
PASSIVE - Enemies hit by your Basic Attacks are burned, taking 60 physical damage over 2s and have their Attack Speed slowed by 10%. Jungle Monsters and Bosses take 4x damage and restore 3% Health and 5% Mana when they die if they are burned. This effect can stack up to 4 times.

Jotunn's Vigor
GLYPH - If you drop beneath 40% health, gain 10% Movement Speed and 30% Physical Ability Lifesteal for 5s. This effect may only occur once every 15s.

Berserker's Shield
PASSIVE - Can only be built by Assassins or Warriors. While below 40% Health you become Berserk for 5s. Berserk provides 7% Damage Mitigation. Can only occur once every 15 seconds.

Evolved Soul Eater
PASSIVE - Your abilities heal you for 25% of the damage dealt to targets.

Toxic Blade
PASSIVE - Enemies hit by your basic attacks gain 20% reduced healing, stacking up to 3 times and lasting 6s.

Serrated Edge
PASSIVE - For every non-ultimate ability on cooldown you gain a stack of Cruelty. Each stack provides 8 Physical Power and 3% Physical Lifesteal.

Fortifying Shell
Using this item applies a shield to yourself and allies within 35 units for 100 Health + 12 Health per God Level for 3 seconds. Additionally, all allies take 40% reduced damage from Basic Attacks while the shield is active. When the shield is broken or expires, Allied Gods gain a new buff providing 15% Damage Mitigation and 20% Movement Speed for 3s. Cooldown - 130s.

Thorns of Sapping Strength
Using this item reflects 35% of all damage you take, before mitigations, for the next 3 seconds, back to its owner as Magical Damage. If you are dealt 120 * your level damage while this effect is active, the effect will end early. While this is active enemies can only lifesteal from you for 75% of their total lifesteal. Each basic attack from enemy gods reduces the cooldown of this item by 0.5s. Cooldown - 80s.

Manikin Scepter
PASSIVE - Enemies hit by your Basic Attacks are burned, taking 16 Physical Damage (+5% of your Physical and Magical Power) over 2s and have their Attack Speed reduced by 4.5%. Jungle Monsters take 4x the amount of damage and restore 3% Health and 5% Mana when they die if they are burned. This effect can stack up to 3 times. Can be upgraded at level 20.

Jotunn's Vigor
GLYPH - If you drop beneath 40% health, gain 10% Movement Speed and 30% Physical Ability Lifesteal for 5s. This effect may only occur once every 15s.

Shogun's Kusari
AURA - Allied gods within 70 units have their Attack Speed increased by 30%.

Evolved Soul Eater
PASSIVE - Your abilities heal you for 25% of the damage dealt to targets.

Toxic Blade
PASSIVE - Enemies hit by your basic attacks gain 20% reduced healing, stacking up to 3 times and lasting 6s.

Serrated Edge
PASSIVE - For every non-ultimate ability on cooldown you gain a stack of Cruelty. Each stack provides 8 Physical Power and 3% Physical Lifesteal.

Fortifying Shell
Using this item applies a shield to yourself and allies within 35 units for 100 Health + 12 Health per God Level for 3 seconds. Additionally, all allies take 40% reduced damage from Basic Attacks while the shield is active. When the shield is broken or expires, Allied Gods gain a new buff providing 15% Damage Mitigation and 20% Movement Speed for 3s. Cooldown - 130s.

Thorns of Sapping Strength
Using this item reflects 35% of all damage you take, before mitigations, for the next 3 seconds, back to its owner as Magical Damage. If you are dealt 120 * your level damage while this effect is active, the effect will end early. While this is active enemies can only lifesteal from you for 75% of their total lifesteal. Each basic attack from enemy gods reduces the cooldown of this item by 0.5s. Cooldown - 80s.
Here are some items that you could fit in your build depending on your match.

Manikin Mace
PASSIVE - Enemies hit by your Basic Attacks are burned, taking 60 physical damage over 2s and have their Attack Speed slowed by 10%. Jungle Monsters and Bosses take 4x damage and restore 3% Health and 5% Mana when they die if they are burned. This effect can stack up to 4 times.

Bumba's Spear
PASSIVE - Your Basic Attacks deal +50 True Damage and your Abilities deal +35% damage against Jungle Camps, Structures, and Jungle Bosses. When any of these die you gain a 10% power buff for 30s and are healed for 10% of their Health, 10% of your Mana.

Bumba's Hammer
PASSIVE - After casting an ability your next Basic Attack deals an additional 80 True Damage. After hitting a Basic Attack empowered by Bumba’s Hammer, your active cooldowns are reduced by 1s and you are healed for 5% of your Maximum Health.

Protector of the Jungle
PASSIVE - While in the jungle you gain 15% Power and 12% Protections.

Sundering Axe
PASSIVE - Damaging an enemy god steals 2% (+2% of your Protection from items) of their Current Health away from your target and restores it to you. This effect can only occur once every 10s.

Infused Sigil
PASSIVE - When you are hit by an ability the Infused Sigil gains a stack. This can occur only once per ability cast. At 4 stacks it explodes after 0.5s, dealing 600 Physical Damage to enemies within 30 units of you.

Tainted Amulet
PASSIVE - Enemy Gods that you hit have their healing taken reduced by 30% for 6s. You are healed for 100% of the healing reduced.

Tainted Breastplate
PASSIVE - Enemy gods that you hit have their healing taken reduced by 50% for 8s.

Jotunn's Vigor
GLYPH - If you drop beneath 40% health, gain 10% Movement Speed and 30% Physical Ability Lifesteal for 5s. This effect may only occur once every 15s.

Evolved Transcendence
PASSIVE - 3% of your Mana is converted to Physical Power.

Evolved Soul Eater
PASSIVE - Your abilities heal you for 25% of the damage dealt to targets.

Hydra's Lament
PASSIVE - For 8s after using an ability, your next Basic Attack will deal an additional 35% damage. Abilities that function like basic attacks do not benefit from this. PASSIVE - This item grants 2.5 MP5 per 10% of your missing Mana.

The Crusher
PASSIVE - Enemies hit by your damaging Abilities take an additional 20 Physical Damage + 15% of your Physical Power over 2s.

Brawler's Beat Stick
PASSIVE - Enemies hit by your Abilities have 40% reduced healing for 6 seconds.

Heartseeker
PASSIVE - Your abilities deal an additional 3% of the targets maximum Health as Physical Damage. If you have over 200 Physical Power, your ability bonus damage scales up. This effect reaches a maximum of 6% Maximum Health damage at 400 Physical Power. Subsequent hits on the same target do 75% bonus damage for the next 3s.

Serrated Edge
PASSIVE - For every non-ultimate ability on cooldown you gain a stack of Cruelty. Each stack provides 8 Physical Power and 3% Physical Lifesteal.

Stone Cutting Sword
PASSIVE - Melee Basic Attacks decreases enemy Physical protections by 7, and increase your physical protection by 5 for 3s (max. 3 Stacks).

Qin's Sais
PASSIVE - On Basic Attack hits, deal Physical Damage equal to 3% of the target's maximum Health. If the target has over 2250 Health, the bonus damage scales up. This effect reaches a maximum of 5% of the targets Maximum Health at 3000 Health.

Tainted Amulet
PASSIVE - Enemy Gods that you hit have their healing taken reduced by 30% for 6s. You are healed for 100% of the healing reduced.

Tainted Breastplate
PASSIVE - Enemy gods that you hit have their healing taken reduced by 50% for 8s.

Toxic Blade
PASSIVE - Enemies hit by your basic attacks gain 20% reduced healing, stacking up to 3 times and lasting 6s.

Brawler's Beat Stick
PASSIVE - Enemies hit by your Abilities have 40% reduced healing for 6 seconds.

Contagion
AURA - Enemy gods within 55 units have their healing reduced by 25%. This does not stack with similar Auras.

Pestilence
AURA - Enemy gods within 55 units have their healing reduced by 25%. This does not stack with similar Auras.

Berserker's Shield
PASSIVE - Can only be built by Assassins or Warriors. While below 40% Health you become Berserk for 5s. Berserk provides 7% Damage Mitigation. Can only occur once every 15 seconds.

Hide of the Nemean Lion
PASSIVE - Every 10 seconds you gain a block stack if you have at least 80 total Protections from items and abilities, preventing 50% of the next Basic Attack's damage. For each additional 80 total Protections from items and abilities the max. stacks increases, up to a cap of 3.

Breastplate of Determination
GLYPH - Each time you are hit by an ability, gain a stack of 5 Protections that corresponds to the damage type you were hit with, up to a max of 4 of each type. Once you reach max stacks of both kinds, gain a burst of 20% Movement Speed and double your Protections gained by this effect for 8s, after which all stacks are removed.

Breastplate of Vigilance
GLYPH - When your ultimate ability has finished casting you provide an aura in a 40 unit range around you reducing basic attack damage from enemies by 15% for 5s. This effect may only occur once every 45s.

Void Shield
AURA - Enemy gods within 55 units have their Physical Protection reduced by 15%.

Shifter's Shield
PASSIVE - While over 75% Health, you gain +30 Physical Power. While under 75% Health, you gain +40 Protections.

Shogun's Kusari
AURA - Allied gods within 70 units have their Attack Speed increased by 30%.

Bulwark of Hope
PASSIVE - When you take damage and are below 40% Health, you gain a Shield with health equal to 12% of your Maximum Health for 20s. Can only occur once every 60s.

Pestilence
AURA - Enemy gods within 55 units have their healing reduced by 25%. This does not stack with similar Auras.

Talisman of Energy
PASSIVE - Getting a kill or assist on enemies causes you and allies within 70 units to gain stacks of energy. Energy stacks provide 2% Movement Speed, 2% Attack Speed, and 10MP5 per stack. Lasts 10s and stacks up to 6 times.

Runic Shield
AURA - Enemy gods within 55 units have their Magical Power reduced by 40.

Ancile
PASSIVE - Whenever you take Magical Damage from an enemy ability you unleash a shockwave that Silences all enemies within a range of 30 units for 1s. This effect cannot trigger more than once every 30s.

Caduceus Shield
AURA - Allied gods within 70 units have their Healing increased by 20%.

Mantle of Discord
PASSIVE - If you take damage below 30% health you unleash a shockwave that stuns all enemies within a range of 20 units for 1s and become immune to Crowd Control for 1s. This effect cannot trigger more than once every 110s.

Magi's Cloak
PASSIVE - Protects you from a single hard Crowd Control effect or Root once every 70 seconds. When this occurs, you gain 1s of Crowd Control immunity.

Cloak of the Ascetic
Using this item causes you to Enter a meditative state where nearby allies gods within 35 units restore 30 + 4% of their missing health and mana each pulse. Additionally each pulse reduces cooldowns for all abilities by 1.5s. Pulses occur once every second for 4s. Cooldown - 130s.

Temporal Beads
Using this item removes Crowd Control Effects and makes you immune to new ones for 2s. Additionally, your active cooldowns are reduced by 3s on use. Cooldown - 140s.

Emblem of Increasing Peril
Using this item Slows the Movement Speed of all enemy gods within 35 units by 30% for 5s. Their Attack Speed is reduced by 25% for the duration. Additionally, their Damage Dealt is reduced by 15%. If an enemy deals 10% of an Allied God's Maximum Health within the duration, the debuff's effects are increased by 10% each, stacking up to 3 times. Cooldown - 110s.

Entangling Wings
Using this item increases the Movement Speed of allied gods within 55 units by 20% for 5s and makes them immune to Slows. On use, this Relic also Roots Enemies in the area for 1s. Cooldown - 110s

Sundering Siphon
Fire a bolt that travels 50 units, stopping on first god hit, reducing any active shields by 75%, and linking them to you. For the next 4s, they are dealt 5% of their Current Health as True Damage every second, and you receive half that amount as healing. Enemies can break the link if they move 60 units away from you. This relic has 2 charges. A second hit on the same target will just refresh the duration. Cooldown - 110s.

Blighted Ankh
Using this item reduces the Healing received by all enemy gods within 55 units by 60% for 10s and removes 75% of any currently applied shield. Enemies that are healed by god abilities while affected by this curse take 20% more damage from all sources for the duration of the curse. All healing reduced by this effect is instead distributed to your allies in a 40 unit radius around you. Cooldown - 100s.

Aegis of Judgement
Using this item makes you invulnerable to damage and healing for 1.5s, and prevents you from taking any actions. You may still move. At the end of the invulnerability, you explode dealing 100 + 50% of the Prevented Damage as Magical Damage in a 30 unit radius. The damage dealt by this effect is capped at 20% of the enemies' Maximum Health. Cooldown - 140s.