Get dragoon to 60 since you already have that at 34 or whatever, and level monk on the side til that hits 60, and play around with each as you go.

If you're in a static though, and they don't have a MNK or a DRK, I'd kind of suggest going MNK only for the INT down. But if they have a MNK or a DRK, then I'd say go DRG for the offensive utility.