Alathra's now level 16 and I'm starting in on floor 9, which is of course where that difficulty ramps up! However, I just went back to kill the Butcher and now I'm gonna take out Leoric. The Butcher was SO easy to take out with a level 16 rogue I figure Leoric will be too. Diablo tip - wait to kill these two til later, when you're stronger!