He spawned as a static at the end of the tunnel at -422, -770, -477, and then he spawned again as a wanderer through the main adjacent tunnel as I was waiting for someone to loot the first.
I forgot to mention in my earlier post but remembered as I killed him again today - he is NOT kos. This is very convenient as it doesn't matter if he pops and roams by your group when you aren't ready; you have time to prep.
Spawned for me in the Cliknar area at the very bottom/end of the east tunnel from the dwarf/giant area. He was a pather in the south tunnel. His PH was an erect model Cliknar that pathed.