It seems pointless to kill them completely. They will still resurrect according to the script and, as far as I know, they don't have any items.
But I insist on killing them, at least for the experience. Otherwise, how will I level up my mentor? I won't be able to train a necromancer to a decent level, and there will be no one to defend the castles. I have one strategy for playing all the games.
Added 9 minutes later
I gave Alaric the shackles, and then took them back in battle. Now all the dummies are stuck and not moving)))) I'm going to tear my hair out.
Added 7 minutes later
It seems pointless to kill them completely. They will still resurrect according to the script and, as far as I know, they don't have any items.
Well, we've endured worse ( : ), so go for it!