What I will be playing in the gauntlet - Caustic Arrow Of Poison 3.25 Deadeye

You will need a helmet with reservation implicit as soon as possible to fit in all 3 auras. Blight works too, but will take a while. The bow can be any of the 3 good bases, ideally find a fracture with either chaos dmg or any of the phys and then try either harvest rolling or essences. If nothing else you can always harvest reforge chaos with 50% chance to get chaos dmg mod and hope it rolls with some phys mods(fairly low chance). Make sure your helmet/body/gloves are hybrid. Boots can be full evasion, we mostly just want speed, life and supp from them, and since speed takes up one prefix, might as well have an easier time rolling the spell supp. Build struggles with accuracy, find some on gear.