>Can heal immediately from a burst from an assault rifle/7.62x39mm
"Haha! What are going to do now?!"
[Mozambique Drill, two to the chest and one to the brain pan]
Dead men experience quite the difficulty healing and coming back. And even if they are undead or brought back via necromancy, it's going to be difficult for them to accomplish much if they are set on fire, decapitated, dismembered by full auto surgery or blown apart by explosives.
There is no overkill. There is only "target neutralized" and "I need to reload."
Magic loses, the end.