Emergency Tactics should include instant cast

[Remilia_Nightfall]

Great for after big hits, or if you let em get a little lower during Cleric Stance-ing that you'd generally prefer - either way it's mathematically based on potency and cast times our best way to get a tank up quick from low hp.

I see your point. My problem is that I always do my reasoning assuming I have another healer with me. Most of the time, if the tank has an Adlo up it also has one or more Regen effects. There is no reason to top him off with ET, unless you expect another tank buster right after the first one.