when you get to the point where you can easily fight mesmerizes (they are unicorn like creatures that are found in the trabia area.) get as many mesmerize horns as you can because they can refine into mega-potions and seems as your magic stat will be quite low these will be useful. low magic stat means that cura and curaga wont be all too powerful. good luck. if you level up to level 100 your HP will be just over 3000 without junctioning so you may or may not want to do that seems as the enemies level up with you. id suggest getting up to at least level 30 so you can draw high level spells from enemies and if you can beat bahamut i think youll find it useful to refine his card into 100 megalixirs. i take it your refining a load of stuff to get high level spells. cards are usually the best way to get good tihngs from refining E.G. the diablos card refines into 100 black holes which teaches quistis a blue magic skill and each one can refine into 30 demis. the sacred card (or minotaur. i cant remember.) refines into 100 dinosaur bones which get you 20 quakes each and odins card refines into stuff that can get you tons of haste magic. i wont say much more on this sort of thing though because id imagine you know how to get most magics anyway. hope some of this can help.