if you want a decent cure spell then you should try to get the White Wind, to get this spell you need to have an Enemy Skill and a Manipulate (the latter you can get one Cait Sith joins your party) then you need to go back to the area just outside Junon and run into random battles untill you encounter the Zemzelette (think thats how its spelt) and Manipulate him, he will have the spell just cast it on yourself and shzam, you have it.

White Wind is best used by the person with the highest amount of HP for the way it works is it takes the current hp of the caster and restors all of it to all 3 charcters.