I don't play SMN except for super casual content, can someone tell me what they do in situations where people hold their 2 min CDs? How long of a hold is too long? Meaning you just let bahamut rip anyway and intentionally misalign it with your 2s for the remainder of the fight.

An example is EX4 adds phase. It's only like 20 seconds between 2s coming up and everyone using them but should I just let baha rip or spam ruin on the orbs instead?