rift quest:Obey the Fist!  

There is a cave tunnel at the back of Shatterbone Barricade just behind Medic Loros. Go through it and make a sharp right when you emerge, up above the tunnel. There is a bridge across the canyon to the camp of Ansche von Kursk. There are three tents but he is the only mob in the camp and is a surprisingly easy kill.

You can also just head straight out in to the canyon and hug the left wall to the bridge, since you do have other cultists that need killing.