The problem with a lifetap/blood tank in FFXIV is this: You have 17k health, and Hypercompressed Plasma (A1S) is casting. This ability will do nearly 25k damage unmitigated. What good is all of your self-healing against it? And A1S isn't the only place an attack like this exists. In order to be able to support a traditional blood tank, nearly every boss fight in FFXIV would have to change to accomodate it.

Quote Originally Posted by Nektulos-Tuor View Post
RIFT/GW2 helped this by giving the class a second health bar which could be regenerated with the regens that took the damage first before health.
This kind of blood/shield tank, however, could easily work in FFXIV, assuming that the shield would stack with adlo/stoneskin, and getting the shield damaged counts as getting damaged yourself (maybe the shield only absorbs 95% of incoming damage instead of 100%, up to its current shield amont, and adlo/ss are checked before the shield).

--Erim Nelhah