Someone mentioned Sage earlier and that got me thinking. First of all it is essentially the back line Red Mage, very much akin to Scholar as it appeared in FFXI. But scholar has never been particularly powerful before that incarnation.

It would be fun to see Scholar as a class with Sage as a job. With access to mid level black and white magic, and more importantly as Sage abilities... Meteor and Recall! Recall would be hilarious and fun, randomly cast a spell, occasionally resulting in a high level cast they don't have access to.