MNK, on imps in order to get skills up too. Astral burn is cool and all but skilling up to level 80 is going to take twice more time than the exp needed.
Probably MNK then BST, MNK would probably be quicker to get to 80 than BST and considering how much soloing i've been doing a few lvs in a pt might be a nice change. Plus I have things planned which MNK would be better suited :P.
I got a 75 job to cover almost all rolls with a little adjustment. I will wait and see whats in demand at the time I decide to XP again. But I would like to sam/brd/thf<farming more or less>bst/blm/whm/smn/nin