Would still appreciate if you could do the mnd and vit tests. Would probably be easiest on Cure III. Anything above 231 skill (260 HP healed) takes 5 skill per HP. Do enough to find out exactly how much mnd/vit is needed to bump the amount cured up a point for at least 3 cure values.
I've got exact scaling values for all of tier 3, and most of tier 2 (Cure 1 only has data from the ffxiah post, and Cure 4 is a little peculiar), and amount cured for caps 3 and 2.