I think you can do it. This is similar to my goal on FF12 of maxing out the License Board before completing the sewers at the beginning of the game.(Not yet completed) Or when I spent an unknown amount of hours(300+) on La Pucelle Tactics getting Prier's first Title of Demon Lord in Chapter 1.
If people could read my mind, I'd get punched in the face a lot.
It might be possible if you have the time and patience. You can fight seifer in one of the days and he give 63 exp (confirm?) when you beat him. Then you can turn around walk into another area and walk back in and fight him again.
GT: khaos198 La shay' haqiqah, koulo shay' moumkin. Nothing is true. Everything is permitted.