Freya is played best if you are always abusing polynomicon. I have provided the poly build and an inferior build for those who cannot play with poly and want something simpler.
Poly with Typhon's continues to provide +99 power instead of +75, + 40% lifesteal to all lifesteal, giving you walloping basic attacks every 3 seconds, when an ability is activated.
All 4 of your abilities activate poly proc on the next basic. So there is big value to using your "whoop" (banishing) with your 3, (next basic will proc) getting close up, melee'ing with your 1 a couple times, and as poly is finishes its 3 second cooldown you activate 2 and basic until you run out of ranged basic attacks. At this time poly CD is up again, ult, kill them, and enjoy a poly proc on the next basic.
You should always be considering when poly is hitting its 3 second cd timer and training yourself to either time it or look down at the timer and back at the target easily.
This start is better than tier 2 (talon) trinket for dmg/clear; lifesteal is only slightly worse (2%).
Y10 Tiny Trinket
Hunter's Blessing
+15 Basic Attack Damage +10 MP5 ROLE QUEST: CARRY Kill or Assist Lane Minions or Enemy gods to gain stacks. Lane Minions are worth 1 Stack and Enemy gods are worth 5 Stacks. At 75 Stacks Hunter's Blessing Evolves, gaining 15% Attack Speed and an additional 15 Bonus Basic Attack Damage.
Healing Potion
This consumable heals 250 Health over 25 seconds.
Mana Potion
This consumable heals 150 Mana over 25 seconds.
You can choose pen boots if you are better at positioning so you don't die between the CD of her 2 activating ranged attacks so its your preference on the boots.
Typhon's provides +200, +50 more mana than Bancrofts too.
Choose to finish boots or Typhon's first based on your gold and how the game's going.
Hunter's Blessing
+15 Basic Attack Damage +10 MP5 ROLE QUEST: CARRY Kill or Assist Lane Minions or Enemy gods to gain stacks. Lane Minions are worth 1 Stack and Enemy gods are worth 5 Stacks. At 75 Stacks Hunter's Blessing Evolves, gaining 15% Attack Speed and an additional 15 Bonus Basic Attack Damage.
Shoes of Focus
Y10 Typhon's Fang
PASSIVE - Your Healing obtained from Magical Lifesteal is increased by 15%. Your Magical power is increased by 1.5x the amount of Magical Lifesteal you have.
This build does the most damage vs squishies. Pen boots or CDR boots are interchangeable but PEN boots are kinda nice for that added first shot mmph.
Hunter's Blessing
+15 Basic Attack Damage +10 MP5 ROLE QUEST: CARRY Kill or Assist Lane Minions or Enemy gods to gain stacks. Lane Minions are worth 1 Stack and Enemy gods are worth 5 Stacks. At 75 Stacks Hunter's Blessing Evolves, gaining 15% Attack Speed and an additional 15 Bonus Basic Attack Damage.
Y10 Tiny Trinket
Healing Potion
This consumable heals 250 Health over 25 seconds.
Mana Potion
This consumable heals 150 Mana over 25 seconds.
Shoes of Focus
Y10 Typhon's Fang
PASSIVE - Your Healing obtained from Magical Lifesteal is increased by 15%. Your Magical power is increased by 1.5x the amount of Magical Lifesteal you have.
Hastened Ring
PASSIVE - Hitting an enemy God with a Basic Attack grants Haste for 6s, causing you to be immune from Basic Attack Movement Penalty. (Internal Cooldown 25s)
Y10 Telkhines Ring
PASSIVE - Your Basic Attacks deal bonus damage of 5 (+3 Per Level). This effect does not hit structures.
Y10 Polynomicon
PASSIVE - Using an ability gives your next Basic Attack within the next 8 seconds +75% of your Magical Power as additional Magical Damage. The effect can only apply once every 2 seconds.
Rod of Tahuti
PASSIVE - Basic Attacks and Abilities gain 15% additional Magical Power against targets below 60% Health.
Use the same start with hunters blessing
You can build Obsidian Shard fourth item if need be (they have a ton of magical protections at that point in the game but it will only happen if you have several like 3-4 magical damagers on your team)
Remember that Spear of the Magus puts Demonic Grip to shame on Freya... as long as you are building Obsidian you will get more damage from it than Demo. Stick with Magus as each hit of your 2 and 1 decrease the protections.
Freya ADC should be building Toxic blade for antiheal too either last item or situationally appropriate if you need it earlier.
Y10 Typhon's Fang
PASSIVE - Your Healing obtained from Magical Lifesteal is increased by 15%. Your Magical power is increased by 1.5x the amount of Magical Lifesteal you have.
Shoes of the Magi
Hastened Ring
PASSIVE - Hitting an enemy God with a Basic Attack grants Haste for 6s, causing you to be immune from Basic Attack Movement Penalty. (Internal Cooldown 25s)
Y10 Telkhines Ring
PASSIVE - Your Basic Attacks deal bonus damage of 5 (+3 Per Level). This effect does not hit structures.
Against loki you can banish his decoy with ur 3
If her 3 is available then you must avoid bellona this goes for any god with a disarm really