Who is supposed to use limit break and when?

[Teiren]

Using Melee Limit Break as the standard to compare to: Caster Limit Break is roughly 2/3 of Melee Limit Break and Ranged Limit Break is roughly 90% of Caster Limit Break. That's right. Ranged Limit Break is almost as useless as it was pre-3.0! Weaker than Caster Limit Break, very thin so it's easy to miss enemies with (like every line attack), and just to make sure it's awful, the person using it can't even see its area of effect. I don't know why the devs decided to be total idiots here. However, because it is still 90% of Caster Limit Break's damage, it's still considerably better than Melee Limit Break against even 2 enemies. Melee Limit Break is only to be used for single-target fights or if Caster/Ranged Limit Break would cause too much overkill.

I've never bothered with the math to figure out if BLM using Level 1 Limit Break, Skyshard, on a single target is actually a DPS loss or not, but I'm pretty sure it is unless it kills the enemy, obviously. Of course SMN using Level 1 Limit Break on a single target is a DPS gain as long as they cast it right after Fester so that its cooldown is going during Skyshard.