This is what i use.
Pop spirit walk, soul harvest, hex and slow mobs with grasp of the dead.
first three spells got CD on 15 sec and grasp got 8, so in that time spray bats all over the place.
Repeat it over and over.
Use big bad voodoo for tougher opponents...
What you think?
i blow up my dogs when im in a pinch , and jumping firebals for aoe !
This build is working fine mana-wise until Hell, where the mobs don't die fast enough.
I oom every once in a while, but the build works pretty good.