Quote from Noppes
Go to global -> factions -> selection your facriont -> select who he is aggressive against.
Unable to replicate the cloning problem.
Oh, thanks! And I think the cloning problems was because I was using items from other mods. I have no problem when they're holding Custom NPC's or Vanilla items.
EDIT: Oh, and I have a suggestion. Perhaps create an option so that healer NPC's only heal certain NPC's/factions?