Each LB has it's uses, but the two most commonly used ones are the Melee and Healer LB...

Using the LB against mobs is generally a waste in my opinion, it doesn't kill them in one hit, and if the party is worried about surviving a giant pull with the use of an LB, tank LB might do a better job, keeps the mobs from doing too much damage for a while...

In dungeons you can usually get away with LBing the first boss if it's up by then, as it'll be up again by the final boss most certainly.
In 8 mans (raids and trials), you technically can use the LB as soon as it's ready, unless there's a DPS check mechanic... But you should probably keep it around in case someone fucks up and healers need it.


Tank LB is either a mechanic, or if people fail at certain mechanics and the party is about to be oneshotted.