Me and my guildy managed to beat Duncan last night in HM using heroes, and the chest ended up being a complete letdown.


Don't worry, my guildy let me allow his name in the screens.
You would think that being HM you'd get double drops from it, which would include the gemstone and armor, but you don't. You still only get 1 onyx, 1 armor remnant and 2 completely random drops.
EDIT: oh and btw, Lightbringer no longer affects the dwarves in Slavers.