I dropped the girls down behind the Besaid waterfall last night with a lure bracer, high defensive grids, haste on the healer, and this trick.
Healer: Prays very fast.
Other two: attack every turn.
I came back this morning to find they'd all maxed out their job abilities nicely. :)
Okay, that's SO LAZY, but I play games for the adventure, charcters, and plot, more than for the thrill of the combat.