Generally, what I do is I stoneskin healers 100% of the time and then I'll watch players if I notice they're idiots taking stupid dmg they shouldnt be then i'll include them in my Stoneskin rotation.
I like stoneskin even if it's not the best use of mana only because it gives me a chance to prioritize my healing. If an o'sh*t moment happens SK can really help cushion.
