Wand would probably be the best option for a caster (and even totems build)
Why ? Because there is no other better base to boost your damages.
Elem as extra chaos = big boost
Lightning as extra chaos = big boost
Then, add a multicraft for 2ex cost.
That was my wand in 3.6 Betrayal (arc totem build) :
This post was edited by MrSalt on Dec 2 2019 10:41pm