You can go from 1-50 using ONLY leves and it takes 70ish leves. Combine that with raw crafting/grinding EXP, daily turn-ins, and Ixal... you possibly use 10-ish leves. I've been leveling my ARM and BSM via grinding and have used a combined TWO leves between the two of them getting them both to 40 this week. Level your gathering classes (which is much easier and goes quickly) and you will save not only a ton of gil, but a ton of leves.

Just sounds like you want all max crafters with little effort right now.