Build for a Necro

My necro does good. Max corpse explode, max poison nova, max bone spirit, 1 amp, 1 lower resist, 1 fire golem, 1 monster resist, 10 golem mastery. Fire golem can hold his own, even better in 8 person game cause he has more life, I just basically lower resist them and poison nova and bone spirit them until a few die ( which is like 5-15 sec ) then I corpse explode them. It seems to work pretty good. I can clean cows pretty fast.