Blue Mage might actually be a good thing.

[Nariel]

This, I dunno why everyone thinks things need to be relevant or tied to endgame.

Its not just a bout raiding with blue mage but doing relevant content with blue mage, progressing with you friends with you blue mage, main your blue mage like you could main any other job, even a fisher have more relevant content to do than Blue mage and Fisher is far from being the most relevant of the gatherer after he it level max.