[LordArioch]

There is a level 2 blood spell banish demon that kills any demon failing its magic resist. Unfortunately It costs 100 fatigue and 1 blood slave to cast so it might be hard to mass cast it on a ID enough to kill it. At least it has perfect accuracy. It at least might work as a counter to an ID if he doesnt kill all your blood slaves in combat.
Don't remember that from Dom 1...hopefully it works as a decent counter.