Blue Mages. They can learn a variety of useful spells, most useful:
- The Level X Spells, Level 5 Doom, Level 4 Holy , etc.
-Condemned, Aqua Rake, Big Guard, and usually Pandora's Box/Nova/ Big Damage Attack. Bad Breath, White Wind.
I could go on and on, but yeah, Blue Mages are superior. Besides, Red Mages can't learn the best spells of Black and White magics, and cannot equip the best weapons/armor.
Like 8-Bit Theatre, "They're only average in what they do" or something like that
Of course, If you're a Red Mage Pirate....