I'm going to look into it. I have such nostalgia for FFT.

I recall making an uber-Mostadio at one point.
I leveled him up to 100, turned him into a mime, walked him back and forth over the level trap on one of the fight screens until he was level 1 again. Switch class to ninja, level back to 100. Switch back to mime, drop him back to 1.

Character stats go up/down on level up/down based on class. Mime class had terrible stat growth. Ninja had great speed buff when leveling. Other classes could pump various other stat on level up. Just always level back down as Mime.

He was more OP than Orlandu.