If you can find something that you have the mats for, you can start crafting it all day. It becomes a lot easier to spam craft if you have Botany up to 50.

As an added bonus, if you can sell said items on the AH, you can make some gil in the process.

Toss in a Salt Cod and Helping Hand and it's about as good as you can get.

However, Leves still outshine it by a lot. Like, A LOT.

What I did was level up a DoW/DoM/DoL class for a few days and let the leves build up.