Simple Solution to BLU

[Exodus-E]

I have a better idea: make Blue Mages a DPS job that also branches off from the Arcanist class.

Except in this case, replace the whole pet thing, and instead, whenever you use the "Summon" skill, you make the Pet Hotbar appear for you to choose any Blue Magick you've learned (through something like, say, the Blue Mage's first job skill), depending on what "Summon" you used, like "Summon I" for attacks and "Summon II" for support skills.
The other skills it could learn through Job quests could be things that could help enhance any skills it has learned or something.

There, problem solved.