Arc the faithless
the three worse areas to lvl
Dune
Kahzam
Garlaige
basically the first for beginning area - quifrim
Actually I very much enjoy lvling in Kazham, and even in Garlaige (32-37). I like Kazham because the exp is fast and sweet and the tnls are small so you can just jump 25->30 in one evening, especially if you have a BRD
razz This is the place where parties start to be half decent, and if you're new to the game you actually start understanding what the hell is going on.
I also like Garliage since its so close to Jeuno you don't have to worry about treking out there/treking back. If you have a good skillchain going on exp is pretty fast.
The dunes is always a nitemare but its just a learning curve, and at least if you can't get a party then you can make exp soloing in LaThiene or Konstatch.