Seems to spawn from any of the golems on the east wall. Easy to pull without adds. Me and wife killed him twice with little difficulty the other day. 90 shm 2400 aa and 90 rogue 1450 aa, t5 clr merc and t5 war merc tanking. With counterbias on, my mercs health was pretty stable most of fight. He does cast a somewhat nasty aoe maybe 2 or 3 times during the fight. AoE might have hit me for about 3O to 35% of my health with all my lucid/t4 gear on, maybe a bit more but I can't remember. One group heal usually would cancel it out and his recast is pretty spaced out. Merc never got below 40% heath. Dropped shield first time. Dropped cracked femur and feet remenant on second go. Each fight took about 2 minutes. Clr merc didn't use up very much mana, my shm was at about 65% mana each time, mostly from dotting and throwing out some extra security heals just to be safe. (didn't cannibalize during fight)