I mean, on a personal level it would probably be NIN, because it's easily my least favorite job. It's already 60 so a moot point, but there you have it.

Any of the ARR starting jobs would do, though, as they gain 59 levels from a jump compared to 30 (DRK/MCH/AST) or merely 10 (SAM/RDM, though if I recall you can't use pots on them anyway).