Had some more time mull this over and im generally of the opinion that Tanks should at least communicate their intention, but I'm not really getting behind this whole bad tanks not mitigating enough etc...

Every healer has access to what I call predictive healing spells and some kind of regen (healbot in SCH case) Example of predictive healing spell:

AST - Earthly star

I honestly don't see how we healers can't keep a bad tank alive if we plan ahead using such abilities. A largesse regen when the tank has finished the pull will keep them reasonably healthy for the majority of it's duration and using one of the predictive healing spells after you apply said regen will normally involve the spell being ready to do it's thing as the regen is finishing it's countdown. If that is not enough then you always have your oGCD heal to fall back on. I've done plenty of runs myself where I've only ever used regens and my oGCD heal to get us through it.

Continued in next post...