I wouldn't look that deep. The value you change is in the routine that runs for all units at the start of a turn. It's just where the +10 is located. Basically, everyone uses this one number.
Even that max MP code works in a similar way. All allied units run this routine which sets their MP to max after a battle (and probably during other events as well). If you want to mess with individual unit MP stuff then you'll have to write some of your own code in.
Even that max MP code works in a similar way. All allied units run this routine which sets their MP to max after a battle (and probably during other events as well). If you want to mess with individual unit MP stuff then you'll have to write some of your own code in.