Why doesn't Blue Mage have a Limit Break option?

[MellowMink]

Considering we'll probably be able to fight Seat of Sacrifice during EW, perhaps the chance to learn it has yet to come.

But that being said you have Final Sting, Diamond Back, and while White Wind doesn't raise it's still very op.

That would actually be a great place to learn that as an acquired trait, although it does mean that you would need at least one tank (that isn't a blue mage) in the party in order to survive the Limit Break attack.