This is what I meant. It looked like a lot of the two bytes was empty space, and the one-bit assignment for sphere felt a little constraining. Even allowing just three bits would give a total of eight possible classifications for spell sphere, which would cover pretty much all the classic forms of Final Fantasy Magic. Adding the fourth would allow people to assign spheres to 'magic' abilities, such as a list of martial arts 'spells' that only one character uses.