Overboss Kaznak  

a sarnak warlord is the placeholder over in the area with the scaffolding near the east cave entrance to Kor-Sha. I got him to spawn in the 2 PH locations on the scaffold and where the roamer is between the scaffold and the big portal to the east. 5 hours of clearing resulted in 3 spawns total. Dropped 2 chest pieces one time, wrist and boots the next, and only the aug on the final spawn.

It had about 30m hp, max hit just over 38k