Originally Posted by
Iyrnthota
IIRC depending on which DPS numbers you're looking at, the difference in tank roles alone account for about 0.35-0.8% of the door boss' health.
Which doesn't sound like a lot, but if you're constantly hitting enrage at 50%, that's gonna sting.
I haven't looked at the specific numbers for DPS/Healers, but I think there are similar differences in DPS. Healers I think are a lot closer.
With that in mind, the difference between a fully "meta" comp (MNK, BLM, DNC, GNB) and a fully "non meta" (RPR, RDM, MCH, PLD) could be anywhere between 1.4-3.2% of his health, which is by no means insignificant.