You're going to end up leveling faster than someone like me! Although it's really difficult to level up more than two classes at once, or so it seems. I tried leveling both lancer and conjurer together (Taking a day for each; keeping them similarly leveled) and I ran out of quests. I had to start doing FATES(?), grind out the hunting log(?) and than some pure old fashioned mob grind to level up. I'm not sure if the instant level ups are staying in release, but it'd make things a lot easier for the classes you didn't get a chance to level up.