I am PvE only and it really seems like a tough choice even though i see most people went with Crippling Grasp. If I take grasp I get a little extra damage upfront and a 1.5 second stun. The small amount of upfront damage it gives doesn't seem all that good but the stun is a nice interrupt and seems like it would be awesome in PvP.
On the other hand with Debilitate you can put the DOT on unlimited targets. In PvE wouldn't this give an advantage? At range it seems I could hit 3 targets with it real fast and then slam down wall of elements followed by Swallow soul. With wall of elements hitting them, swallow soul returning health, and Debilitate DOT ticking it would seem they would drop fast and I'd be safe.
I am just torn on which to choose, why does everyone love Crippling Grasp in the majority of posts I've read? Is it just for the stun or does that little extra damage(437 at my level) really help? My Cripple does 2570 damage over 8 seconds at my level so putting that on 3 mobs seems like it would help but maybe I'm not seeing the big picture?