Ulillillia is not an aspie, he has OCD. When someone with OCD has a compulsion related to video games, they don't need to justify 8 straight hours of shooting bird men.
He has the gambits off? He's going around killing such petty monsters by taping the (x) button over and over and over for hours to no end? The great thing about the gambit system is that you could just leave the control taped with something and let the characters grind against this kind of enemies. But actually doing it manually? We're not in the 90s anymore dammit, what a crazy fucker.
He's not even doing it right. There's a set of two really strong monsters in a zone next to where he's grinding that you can destroy with limit breaks, save, heal, and repeat that give huge amounts of XP.
He spent 40 hours leveling a character up and he ignores items so that he can save 10 seconds walking to the next point where he can continue leveling the character up.