OT dps

[Credor]

You should also have Voke ready which would help if you BLM is going hard or just tell your BLM not to use procs right away on the add. F3 Bahamut then go back to the add. Either way you should be able to handle it. They will also have quelling available for whichever add you have the least amount of threat on. (sounds like the 2nd in your case)

My mates in FC are specific, they like DPS maximizing. Sometimes this means hard way for tanks but ... this is challenge for all. So, I must use every available skills for catch and hold aggro, when they try burst damage. Quelling strike - yes, but there is 3 adds. Voke? This will work when DPS stop when get aggro Not in my FC.
But my strat with Zerk/Unchained is good way. Zerk gives +50%, Unchained +33%, this is sufficient to catch aggro with Skull Sunder, then next played BB gives enough enmity for hold add to his death.