You should be able to comfortably get 3 gcds in the window. Its not exactly bloodbath or ye olde steel cycling+inner release, but the real point of it is the 10% mitigation when you have 2 tanks. The heal effect is really secondary and only useful in dungeon packs with some fat chaotic cyclones as it shares recast with our tank buster mitigation. Its primary purpose isnt to replace bloodbath/steel cyclone+IR spam heals. Its a mitigation tool when you OT that has the side effect of being decent in mega dungeon pulls.