Just wait until the Ashlands, where the Charred are going to essentially be perma-aggro Dvergr lol.

Though they might work more like the Goblins and less like the Dvergr, but I hope not. The thing that makes the Dvergr so dangerous is they have some kind of hive mind communication, and if you aggro one, all the bois are comin to roll your ass. At least on a settlement by settlement basis. (I assume their special wards act as some kind of faction hook)