Ah yes, another princess tank who thinks they are the most important thing in existence.

Hell, judging by how stupid a good portion of tanks are in ST (they fight over aggro of the main boss and don't help with adds) I'd say just having one tank for the entire raid would be fine. As a BLM, I'm most often the one that gets the add in place during the Glasya Labolas fight. That's how useless they can be.