Guardians Blessing should be on here but I cant add it. Usually start Guardians Blessing plus a level in boots. If you don't want to start Guardians because you wont use it in your final build, that's a personal choice you can make. Also pick up two wards and some HP pots before I leave the fountain

The Pridwen and Breastplate of Valor really give Cerberus a much needed lift in the cool downs department. I usually always build these items. Pridwen is a great option for ensuring you stay alive when engaging a team fight with your ultimate. Really helps you out if you can snag it early.

Keep in mind, there is no one perfect build for all matches. You will have to juggle whatever defensive options you need with whoever you're going against. If you're going against a double mage setup, more magical defense, multiple physical gods need more physical defense etc.

AURAS:

Jade Emperor's Crown is great in situations where you have one or more physical enemies on the other team that are causing a problem for your team. Great for when you jump in and use your ultimate to initiate what you hope is a team wipe.

When looking to help buff up the rest of your team in a team fight, look to the Heartward Amulet (Magical Def and MP5) or Sovereignty (Physical Def or HP5) depending on the situation.

Pestilence (Magic Def) or Contagion (Phys Def) should be picked up when you encounter an issue with healing on the other team. Whether its one god healing themselves, or them healing their entire team, these items will help nip that in the bud. Keep in mind that as Cerberus you rec3eive part of the enemies heals.

Void stone is great when you want to get a little more of an offensive oomph for yourself and also make your opponents more vulnerable to your attacks, and those of any magic based gods on your team.

The only offensive options I may spring for with this build, are Pythagorem's Piece or Gem of Isolation. Usually Pythas. Rarely go for Gem unless the slow would really contribute to my teams ability to score kills.

Pythagorem's piece is another Aura item that will increase not only your lifesteal, but that of your teammates. Lifesteal will help keep you and your team in a fight longer.

As with everything else, you must build for the match you are in. If you are facing gods that you are having a hard time getting away from alive, Aegis and Beads are great options. Choose beads if it is due to a knock up, stun, etc that you are getting trapped and killed. If it is just due to the amount of burst damage a god does, swing for Aegis instead. You do no good to your team dead.

Belt of Frenzy is really great for a support role, giving you and your team increased damage to everything, as well as attack speed and penetration. Great for making a push down the lane, and your teammates will thank you.

Shield of Thorns is a great option for engaging the enemy team. Jump in with it on while you pop your ultimate and when they try to focus on you, you will reflect the damage back to them and hopefully help your team secure a wipe.

If you find yourself in a situation where your team needs Meditation you can always pick it up, I generally do not in Joust, but sometimes it does really help.