Originally Posted by
ColdestHeaven
He meant that we gotta go to the flank and the rear of the boss for a couple of our abilities - and we can't do that if we have the aggro of the mob. -15% damage because of no Heavy Thrust and ~8-9% even less damage because of no Disembowel - not even mentioning the loss of Chaos Thrust. Also, you can't really expect dragoons to be top aggro after tanks, depending on how many shrieks they got and how good the other DPS are. Assuming everyone is on equal level, during battle, dragoons will lose aggro.
Also, for anyone suggesting that, good luck on being "off-tanks" during adds phase.