Captain Mathias:
So, you want to take a shot at the Varka Silenos and the Ketra Orcs?
You are going to want to kill their leaders. The ones to hunt are Shadith, Moss, Horus, Hekaton, Tayr, and Braki. You don't need to kill them all... killing 1 should send the message. Oh, and once you are done... bring back their Shattered Bones. as proof you have completed the assignment.