Next Job/Jobs Speculation

[Shiro--Tsubasa]

I don't know how a mage could be a tank? mages tend to be pretty squishy which means they'd make poor tanks.

Blue mages are unique in that they gain power through being hit. They are not your typical mage. Most of the Blue Mage characters that I know of tend to be able to take hits and provide support through their utility abilities like white wind and mighty guard. If anything they are one of the most suited jobs for a tank role due to their tendency to have high health and a diverse array of utility for most situations. The tank role is the only one that can satisfy the job without degrading some aspect of what we know as a blue mage.

[MomomiMomi]

Blue mages are unique in that they gain power through being hit.

Not necessarily. Various iterations of Blue Mage need only see the ability, they don't have to get hit by it.