Which Final Fantasy was the most difficult?

[Formalhaut]

XII, but in a way that just required you to think carefully about your strategies or gambits.

Are we playing the same game? I just set up my gambits once at the start and watched the game beat itself.

Are you serious? FFXII isn't that easy. I would say it is probably on the easier side of the numbered FFs, but it is by no means 'auto-play'.

FFX-2's bonus content is very difficult, requiring carefully considered set-ups. The same goes for FFX, I guess, but there the challenge is coping with the grind of the Monster Arena to 'qualify' for that level of difficulty. Once you're at maximum stats, it is more of a process of following strategy and measured tactics.

The overall toughest game is probably Lightning Returns, if anything.