What you did was bragging about how you found a clever way to level up faster, I just pointed out there is nothing clever about it as it is just lowering difficulty in game's own difficulty option screen.
Difference in xp sharing option for inactive companions is almost neglectable when you do 4 > 6 man party in long run.
Keeping it off and "Only skill user gets xp" always on, without runtime changes, will produce 95+% of same result and should fit your bragging-allowed criteria.
But this kind of battle is difficult to win:
- at first changing options is not nice
- than you abused Deadly Earth and no longer qualify
- and no, modded Unfair is no longer Unfair
- Vivi fans also should not apply, one level dip is cancer
- Communal Delay Poison is implemented wrong, so all fans of Stinking Cloud are almost cheaters
- and those who like summons are abusers of faulty AI
-... Maybe we should exclude everyone with DLC too, they got more money and xp, it is P2W!