an undead jester  

Refferences to locations are in accordance with the EQ Atlas map of the tower.

Locations:
His spawn locations (as well as his place holders), are in multiple spots along the hallway outside of the room where eq atlas says he spawns. If you are standing at the east end of this hall way, facing west, he can spawn around the corner (out of view), and he'll mingle with the burynai (at loc p100, p250) before wandering back down the hall.

Place Holders:
His ph can be any skeleton (including thick boned skel) or a burynai. Something to note about this zone, I went here at level 40, so everything was green. The only burynai that would aggro on me were the ph's for undead jester and the cook. Also, the aggro range is much wider for the ph, than any of the other mobs in the zone.

Different Spawns:
In the stables where the Forager spawns, there are two wandering skells here, they are not ph's for the jester. They will only roam the that section and not the hallway. There are two spawns in the room that EQ Atlas indicates that the jester spawns, I doubt these are ph's (because the buryani that spawn here don't aggro if green), and sometimes they will wander into the room across the hall (but it doesn't hurt to kill em anyway). There is a spawn in the rest of the rooms along the hallway where the jester spawns (they don't roam the hall).
From what I can tell, there are two spawns in the hall, both spawns roam the hallway from location p100, p250 all the way to where the forager spawns. On a rare occaion, these two will spawn back to back.

Timer:
From what I can tell, he is on a 10min timer. I had many occasions where the ph or jester would pop right on time, 10 times in a row, then nothing would spawn for 20 min or so. However, when it would spawn again, it was right on schedule. Also, it seems that the timer resets as soon as you engage, either jester or ph, into battle.

Thick Boned Skell:
This mob only spawns as a ph holder for each of the mobs: Fingered Skell, Cook and Jester (not sure about Forager, mainly due to that I wasn't camping him). So, I've seen as many as 3 up at the same time.

Hope this helps...

PS
So far camped him for about 15 hours, 3 spawns, no club :(