Final Fantasy Hacktics

Is there a way to turn on and off AI control for your units during battle? I want to MOD it so that everyone but Marche is AI controlled in battle (like Montblanc is in the second intro battle) but not sure if it's possible.

I found the AutoBattle MOD below but is there any way to keep control of Marche?

I know it's been a few weeks (you'll get faster replies in the discord).

The autobattle code works by setting the "player control?" check to always be "ai." I'm not sure what would need to be done to create an exception for marche (check the unit ID and set to "player control" if marche?).
In an earlier version of autobattle I had tried setting all party members to guest units (like montblanc in the intro), but the issues were they couldn't learn new abilities and any unit wishing to join the player's team would be player controlled.

As for making "ai control" a toggle-able option in game, you'd need to edit the game's options menu, something I don't know how to do.
Leonarth's engine hacks have some mods which involve changing menu screens if you'd like to mess around with it.