level 55+ exp areas?

ive been doing level sync parties in gusgen mines and crawlers nest, but i was wondering, where do you go after CN? ive been trying to keep everything even skills wise, and CN seems to stop giving me skillups @ 150. thanks for any help/advice you can give.

If you feel lucky, Bostanieux Oubliette, although that area is sort of for 60+. You could probably do it if you had a party that didn't suck.