Level 80 Warrior, solo'd w/cleric merc.
Didn't drop Iris Blade, which was the only trinket item he drops and the only thing I cared about.
Didn't hit hard...generally. Definitely want to kill the eye adds, once they are dead focus on him. He seems to have a really high reposte modifier so... yeah I'd use a 2hander or else he will shred you. I was using DW but switched out. He hits around 400-700dmg on my toon mitigated I assume b/c every now and again he'd swing for a single or double that would hit for 2.5k-4.6k max and somewhat frequent.
Cleric went OOM when he was at 0% and clutch victory at 22.7% health.
Warrior has 32.2kHP and 1223AC self buffed (w/clicky items and cleric buffs)