One thing that's easy to forget about is the Weekly Challenge Log. Make sure you take a look at that to see if there's some Weeklies that you're not doing. Even things like the Weekly Levequest challenge can be a nice little boost of experience. Chances are you've got a few Leve tokens kicking around and by just doing the low level Leves in Gridania you can knock out your Weekly in maybe 10 minutes regardless of what level class you're using since the Weekly reward scales to your level and not the level of the task you do. Same thing with FATEs.