Re: Faith v. 3.0
The man is correct. I once ran the entirety of Ulti's dungeon at single digit HP with Zell, Squall, and Rinoa.
It's fun not taking a lick of damage.
Also, for future reference, don't bother with any of Rinoa's limits but Invincible Moon, and Zell's limits are good, but Armaggedon fist (Punch rush/ Booya repeat combo) does the most damage.