If the MT dies (a rare occurrence), I pick up the boss, assuming it wasn't me tanking it to begin with. Adds in ST and WOD really do not require a tank to tank them, about the only exception is when a bad white mage spams Medica 2 and ends up having to tank/kite 3-4 mobs. WOD, ST and CT are a joke for how easy they are, (most wipes are impossible to prevent as a healer, we don't have a "Cure Stupidity" spell, nor do we have a "Regen Ability to DPS Properly" spell) it's obvious that during any given run at least 4-5 people are afk or semi-afk, barely playing because there is no need for them to do so. I personally welcome more healers be lazy, I might have to try (and actually have fun) then rather than run about pretending like I'm doing my job.