My newer necro has Maxed CE, Maxed Iron Maiden, Maxed LR, and Base level 1 Amp.
So I can easily destroy a section of cows (Usually a large area) with Bonewalls to attract all the cows that I can see on the minimap towards me, Iron Maiden to get first bodies with Blood golem, then switch golems and amp then CE until their all dead.
Or I can support other characters like amazons or sorcies with LR and Amp.