CU is risky or difficult? Since when?

You pop it for a big hit, get the regen going, then go back to what you were doing. It's only risky if you fall into the trap of fully channeling it, which case that 150/tick isn't going to do much for you while you're stuck there. You'll still have 750 potency of healing over 15 seconds when CU goes away, which is pretty great when compared to Asylum's 800 over 24s.

I don't really understand why Asylum doesn't have a damage reduction component. It's the only bubble that doesn't. Thematically, it probably should. For a game that uses visual design to indicate what things do as much as FF14 does, it's inconsistent.