Question about Horrors

[mivayan]

I played with wishing for doom horrors, and equipping them with amulet of antimagic and ring of regeneration. I lost one to a province with 50 mandragoras - undead, lifeless(?), 12 attacks doing 33 stun damage (mr negates). Neither life steal or blood vengeance is particulary usefull in that situation. It took a long time, but eventually the doom horror and half the enemies were dead.