Killed him today a few times. Dropped Ravenscale Coif, Gaunts and BP(Woot!). Above info on spawn time seems about right. Pretty random tho. It was up when I arrived, then took about 4 hours for next pop, then last one came 40 minutes later.
Dropped Ravenscale coif for me twice tonight darn thing is lore gave other away. Seems like the gorillas spawn every 20 mins. Could be mistaken from delirium(been camping the guy for 14 hours). He spawned 4 or 5 times for me in that timeframe but only with coif, hit him 2 days ago and he dropped the gaunts but lost the roll. Could he drop all the pieces? Also heard there were archerons that drop it on top of the pyramids. And just a hunch but there is an NPC named Radiant in the area who is a PH for Silver Tae Ew Observer could this be another Ravenscale dropper?
Got the BP and gaunts tonight and got the archon to pop on the east pyramid he got my druid and warrior before he finally started in flight mode while snared even then it was a tough fight this bugger damage shields himself and others on the pyramid out of about 900hp and only getting hit by him once for 65 dmg I was down to under 30% health by the time he keeled over real dissappointing to see he only dropped a lizard belt 2 ac, 10 or 15 hp and mana. Popped again right after but again only the same belt. If you take him on he has the ds and nukes for around 250 dd with force shock also believe he healed himself during the fight once but not sure.