if you done have your challenge log unlocked, do it asap. alot of the leveling up stuff you can do; after X times gives you bonus xp it helps alot. without tank or healer with you, dungeoning can be.... problematic so fate/leve during is a requirement. that said, check PF for fate parties after 30; its rough in Corethas then but I went from 31-35 on my bard in 2-3 hours without food, no challenge log and no bonus from a higher job on my lala. That said, with all that in play my nin rushed up far faster on her when fate grinding.