There are always Ixal beast tribe quests to speed things up a bit. If you unlocked them, that is, which I believe requires lvl50 in combat class and some progress in Main Story Quest?! Honestly, doing the Main Story Quest is pretty much the main part of the game and a lot of stuff is locked based on its progress, so if she didn't unlock the Ixal beasttribe quests yet, she can as well ignore the crafters till she does. That'll stack up the leves anyway, so she'll have a bunch of em saved for afterwards.

Using the Ixal quests, at 30+ levels at least if you use all the quests available (or all the allowances you have...), give about a level a day till lvl50.
Then you can slightly boost your experience by turning in items for the Grand Company, but this is miniscule.
Also, remember that turning in items that are high quality doubles the experience gained. With limited turn ins a day (be it for leves or grand company), it's a good idea to try and get high quality as much as possible.