I leveled my miner from 30 to 50 with provisioning, bot 46 - 50 with provisioning and fishing 25 - 41 with provisioning.

Generally only turned in hq items when they were reasonably priced on the mb. It took a while but considering I never had to actually go out and do gathering leves I'm pretty happy with the result and it took very little effort, basically just go to GC and check what items are needed and then buy them off MB and turn them in once a day.

All said and done I would say I made enough from my daily dungeons gil wise to afford the items I had to turn in on the mb.

For people who simply like jobs at 50 but don't like gathering and find it useless I highly recommend provisioning.