Ok so I hate Blue Mage as a job, but I think I know how it could be done. Each monster has about 3 skills as far as I can tell, more on the bigger ones. Why not have a BLU that mixes in Magic Blade and Geomancer.

use Magic Knight/Rune Fencer as the base of the Job as in Combos and what not, stances and UI stuff from GEO like MNK, and then have all your OGCDs be from BLU, 4-6 blank skills that are just blanks until you are struck. In Manor and damaged in any way by say a Succubus? One minute with all her skills unless you manually through a command "forget" the skills. Then his by a Eye, all their skills for a minute. Have the Skill called LEARN, that has a reasonable cooldown, hit it, the next incoming damage big or small is blocked/absorbed and you have brand new OGCDs. Hit Learn before the minute is up to dump the skills.

Oh look, an Floating Eye and a whole mess of trash mobs, get hit by the Eye's AoE, you now have a AoE STUN, hit that crowd and stun the lot of them.

Would feel fast paced and you would have to know monsters and be able to think on your feet.