Who is supposed to use limit break and when?

[EllieGirl48]

lol SMN using limit break!!! dont ever run with me. i wont use it. so don't ask me to. someone else can do it better then I can so no SMN shouldnt use the limit break unless SMN is the last one standing with the boss having less then 1% health left... Leave it to the more powerful DPS to use. The SMN's egi is more poewrful then the SMN so dont use it SMN. leave it to NIN, BLM, or DRG. Healers only when whole party is down and you have 3 limit bars. Tanks... Please Tanks dont use either unless you know exactly what your doing, further more it is only a last resort to finish off the boss as with SMN.