I'm not too sure Bladestorm is viable in a fight where an add can spawn at a random place.
DR on Grasping Hands when the Hands themselves die so quickly is kind of a waste when you're better off just simply Bladestorming them.
Liking something and something else being optimal are two different things.
I'll probably just echo Bigbazz here, Glad may be awesome for Infernal DPS but that's the ranged's job, execute phase matters more.
Ok with Avatar vs BB choices. I personally haven't used BB at all but it could be worth looking at considering Sarri's list.