If you could adopt and adapt a system from any FF title...

[Rau]

I bet XIII's battle system could be implemented into an MMO somehow.

and Yeah, XII is the most feasible, seeing as how it is basically XI, but you can control your party o.o

[Fear]

XII is the most feasible, seeing as how it is basically XI, but you can control your party o.o

If you want that may as well give everyone a bot, because thats all the Gambets did is controll the char for you.

[Zetsumei_Tsunarashi]

If you want that may as well give everyone a bot, because thats all the Gambets did is controll the char for you.

Yep.

The Gambit system also allows for auto-leveling tactics where the player can leave the party leveling and gaining EXP without having to as much as touch the controller.

Negalmuur in Stilshrine of Miriam is a famous auto-level spot: it will frequently summon Ghasts and by correctly setting up the party's gambits it is possible to create an infinite loop, which allows the game to be left playing while the party continues to gain experience.