Killed him today with just me and healer Merc. May not have even needed healer; we both ended fight with 80% mana. Felt great; I remember getting whipped by him years ago.
He dropped Phosphorous Powder. Sigh.

Warrior
Hits for ~894; fully slowable.
Blue Diamond
Diamond
Gilded Tome of Burning Blood
Glyphed Rune Word
Obsidian Greatblade
Phosphorous Powder
Raw Diamond
Resplendent Leather Guards
Spectral Parchment