I'd have to say that if you think this is the only requirement then it's false.. Just did this run 3 times last night to cap out a friends myth tomes. 1st party I ran as a Monk with a Dragoon, Warrior, and a White Mage. Dragoon was in level 55 gear and we finished the dungeon in 17 minutes with no wipes. Second Run I ran as my Black Mage,with a first time Monk, White Mage and Warrior. 20 minutes no wipes. Some mistakes but it's no big deal. Last run I went as my Bard with another Dragoon, White Mage and again a Warrior and everyone knew the dungeon, we said hi, and did the dungeon in 15 minutes. Even when I was my Bard, I popped only the TP Song for the tank so he could keep going at the pace he was going so he could spam over power and not stop moving. I don't have a WHM at 50 yet, but out FC healer can do it with no issues with mana sooo I can't agree with this point of view that you have but that's my opinion :/