Yeah, good point about the Cure spells for all characters.
That's the part I have been questioning a few times about my own party of choice - it seems risky that one of the physical fighters should manage all the healing and Exiting from dungeons etc.
I have solved that by trying to carry around a few Phoenix Downs and Elixirs/Ethers whenever I can, although this isn't always optimal.
I never really bought that much equipment from the stores in this game though, because I always seemed to manage fine with the stuff I found in the caves.
The Mithril equipment is pretty nice when you first get it, although kind of expensive.
The best place to buy equipment is definitely Mysidia, lots of nice stuff there.