if your already in the area farming something, might as well clear this PH. He has a guard standing next to him that will hurt your faction if killed, so best to root him off to the side and then fade aggro somehow or avoid killing him with a mind wipe. The named spawns about every 3 or 4 kills maybe, and the little spot directly across from him spawns another named, likewise with the guard.
As stated, the visiting noble is the PH here. Couriers shouldn't add, depending on your faction. Con the King to see where you are. If you've messed it up, you've got some work to do correcting it. Kael is tricky.