I recommend you do the side+quests, those that you have outleveled should be left for a different class. At level 56, if I am correct the new Moogle questline will open-up. This questline wil be a test to how long you can keep your sanity. If you win, the new Moogle Beast Tribe quests that will be released in 3.3 will be very rewarding (according to Yoshida.)