I'm curious as for why you didn't pick secret weapon for either build. It would work nicely especially with the auto attack build, since more right-click damage means more healing through vampiric assault (and well, more damage from your primary source of it). Also I think battle momentum works fine (if not better) with ability damage focused builds, since you will still be auto attacking between ability casts. I feel like it would be a better pick over BOOMerang, since it's damage is a bit...