I can believe what I'm reading.
Why on earth wouldn't you use it?!!
To flash at no damage? To do single target rotation even though at 3+ mobs it's a dps gain?
Whether you use it or not, it has no impact on healer aoe unless you're hust spamming clemency...
I have all 3 tanks leveled and PLD has more sustainable aoe dps than the other tanks. Just need to flash once, pop FoF and spam aoe until out of tp. Then you spam holy spirit to recover tp and repeat...