As a lv 70 drk, I'll tell you that this class is, as Xeno put it, brain-dead easy. The HW complexity is all but gone, and it's just effortless to deal high damage. Basically, DA all the things, keep your mana up, then DA some more, and you're pretty much golden. You can even deal good damage sitting in grit if you want. But if you ever want to do just a touch more, go ahead and turn off that grit. Mana management will be a bit tighter, but not too difficult either. Less sustain, but you hit harder.