Quote Originally Posted by Yorumi View Post
but a few more hp doesn't suddenly make a tank take less damage.
It doesn't, and that's not the point. VIT provides "padding" that gives healers more GCDs to use for things other than healing the tank, whether those things are adding DPS, healing damage to DPS, avoiding mechanics, using utility (in the case of AST cards) and so on. It also provides padding in the case of high incoming damage, allowing the tank to receive a heal before death that he might not otherwise have received.

Would you rather survive a tank buster with 500 HP or 2500 HP? The obvious answer is 2500 HP and VIT contributes to allowing you to do so. It is not the *only* thing that contributes, but it *does* contribute.