Normal Mobs
-Fairy Marble
-Diamond Ore; As they are rare enough as it is, and it would give 85's an actual reason to try and do this dungeon. (Maybe a 1% drop rate)
-New Recipes? I saw in the Update thread that you like the Imbued Item idea, so why not give some new recipes for some new 85 Gear to imbue.
-Then your normal trash drops like HP/MP pots and stuff.
Boss
-Yellow/Purple 85 Gear (Weapons)
-Diamond Ore (since its a boss like a 5 or 10% rate?) Not sure what the rate of drop is now.
-New Mounts? Maybe like a 60-65% Mount for 1 Day.
-All Stats/Brilliant Light Cards
That's all I've got, but yeah, feel free to add in some things, take away somethings if you think it would make things too easy.
Just what I think might help players, and make people more active/willing to do this dungeon.