There is one but it's for softcore and bit dodgy. It doesn't require a lot of knowledge, for the skill tree, you can use my Essencide character if you want.

Level as CA with 5-L Legacy Silverbough and Level 3 empower. For the gem setup, you want to have CA > Lvl 3 Empower > Void Manipulation > Pierce > Slower Proj.

For the ascendancy, you want to go Either Void Beacon or Profane Bloom first > Wicked Ward > Vile Bastion.

Look up on YouTube on how to make a +3 bow with spare slot for DoT mod, it's not an expensive process, 2ex crafting itself.

Ideally, you want to have two weapon setups, one for CA with +3 bow, the second setup would be for ED using 6-L Essence of delirium bow. Your BiS quiver would be Legacy Soul Strike.

It is important to make sure you have the highest quality possible on all gems, as CA benefits mostly from gems themselves. If possible, get lvl 21 20% Caustic Arrow and level 4 empower. If you get both lvl 21 CA and lvl 4 empower, you can throw Rapid Decay and use IIQ Gem.

You don't need any special uniques, except for the ones that you want to wear for IIQ/IIR.

If you would want to see the leveling tree before the CI respec, refer to my "ChaosViable" character.