bah really... if you can't mob, then go for high exp mobs that you can take 1on1...
Hint: Abyss
got no money for fish? use the healer and warper with fly wings etc making you able to always have full hp-sp without burning a hole in your pockets...
if you still can't do all that then you probably don't have enough str-dex to call yourself a proper GT sin...