I do provision missions every day (well, most days), on Botanist and Miner. To clarify that is two-per-day.
If I want this item http://xivdb.com/?item/4518/Tipping-Scales-Ring I need to complete 5000 provisioning missions for the Immortal Flames. So, assuming that I turn in every day (and don't do Fisher ones), this will take me approx 6-7 years to get this item, by which time the level cap will be higher and there will no doubt be more attractive shinys to collect.
I must be missing something here ... right?
Edited because I can't divide 2500/367
Edited, Oct 16th 2013 11:05am by SolomonGrundy