A lot of people wait until the boss is below 10% before using their Limit breaks and some even forget to use it completely. But, there are also cases where you might as well pop the LB3 and see if you can fill up the Limit break bar to LB1 or higher. If that’s the case, you get to use the Limit Break multiple times in 1 encounter.

A great example for that would the the Cloud of Darkness. If done right, you can use 3 LB3’s during that particular encounter (although the question remains if it’s actually faster than just hitting the boss nowadays).

I think it’s a matter of preference or simply a spontaneous act of “I’mma firin’ mah lazah!”. I don’t really mind either way when it comes to dungeons and trials. As long as the target goes down before we do, it’s all fine by me. (^_~ )