Good job!

Anyway, what I suggest for your next playthrough is to do what I plan to do (I'm in the Bevelle trials right now). See, I'm doing a gang of thieves playthrough. Kimahri is one of my thieves, so when I got a lvl 2 key sphere (after the Spherimorph battle in Macalania Woods) I backtracked him to the "side door" next to Use, used the key sphere, and got him Dispel and Reflect that way, light years before Yuna could even dream of getting them. This makes Natus much much easier.