This guy is pretty much a wimp. He harm touches for 823. His max hit is 597, and he doubles. He has around 25k HP, and didn't seem to cast much. He also did NOT enrage. He does summon, but didn't seem to gate on us (although our tank was a paladin, so he didn't have much opportunity to cast).
Our group was a little unbalanced, with two of us dual-boxing. The lineup was 65 pal 64 enc 56 bst 56 clr 55 war 52 shm. He dropped a Spectral Parchment and the Blackened Thinmetal Visage.
This guy is simple to single pull after you clear the way, just watch out for the two or three wanderers that go through the mephit and upper goblin caves.
I know this is 4 years later but even so ... how is this group unbalance, you had 2 tanks 2 slowers, 2 healers and dps, looks like a very balanced group to me even back in 2003