[Bishop] Which skill next?

Mana reflect for sure. That little bit of extra damage over the course of a HT run will add up very quickly. Since your ultimate is only have that of mages, Infinity won't be quite as useful to use as them. If your were a fire/ice mage then i'd say get infinity.

most don't actually use mana reflect at ht due to it hitting random things. You don't want to aggro things that deal damage once bothered. (leg stomp on right side)