Has different spawn points. It spawns in Protector of Dresolik's tower but one night my group fought him and he was the 2nd mini-named upwards, then another time he was way up high in the tower, almost all the way to Protector himself.
This guy is one tough mother-(insert random derogatory word here).
He hits for max of 1515, casts a single target charm, as well as a weak AE called Curse of the Fiend. Tried him with a group consisting of 65 pally, 65 pally, 65 cleric, 65 druid (me), 65 beast, 65 bard.
Was a very tough fight, we were expecting Balefru(sp) but this guy was up instead, beast slow landed fine but we were ill prepared for this fight. Oh yeah one other thing he rampages! Good luck on taking him out, hopefully we can swing it on our way back up.