Then use jelly auto leveling guide:
http://www.gamefaqs.com/console/ps2/file/459841/57125
oh, and about the gambit part, just put Cura>ally>70-80 in the begginning.
then use Hi-Potion(same as above)
then go prio the rest. Be a little creative if you are in a low level and don't have the best.
"Close your mind,
and
Open your heart."
-Swedish House Mafia