I'm starting this thread for the purpose of reading everyone's opinions.
Whenever I play as a melee DPS, I find it best to LB as soon as humanly possible without dying from mechanics. I don't think LB should be saved for when boss is almost dead for the following reasons:
-Using a Lv 3 LB as soon as possible brings down the boss's HP sooner, thus allowing Mercy Stroke and Misery's End to be done sooner.
-It gives the possibility of another LB being able to be used later in the fight (even if it is only Lv. 1, a little damage is better than missed damage).
-From personal experience, I've noticed that using Healer LB 3 in any fight beyond Ifrit HM is basically useless as all the forced damage with weakness will kill you again, and when someone dies due to not knowing mechanics, 8 times out of 10, they don't last more than a minute after being resurrected (assuming they didn't get Landslided, in which case, Healer LB 3 is even less effective).
When do you guys LB?