Make Demonic circle have an effect similar to grounding totem, that either makes you immune to any form of CC while in it, or causes this effect to "tick" every 2-4 seconds, removing ONE CC on any1 in your party, in the circle.
The second option would also be great for AoEing trash that stuns, as you could drop it on the tank.
Good idea, or bad one?
Edit: forgot to add that I believe this would still be balanced because SEVERELY limits mobility, and maybe a wider circle would help, but oh well.