Thanks for all the replies, CD rotation ain't really a problem. It's just some little things that we're missing. For example we had our Warrior second tank just tell us she kept forgetting to dps the conflag. And she usually start when it was at 50% which is nearly 5seconds of not dpsing the conflag. Also we are using a SMN, maybe (if I can convince them) he can switch to his BLM for more burst damage. And have some of the lazy dps actually use food buffs.
There's just these little things holding us backs on such a fight. Just needed to know that indeed conflag we're on different timer and we should aim for under 10second conflag kills to be confident in the fight.