Quote Originally Posted by The White Wizard of Fynn View Post
I'd say XII > II > IV > Tactics. And it's no big deal - if course it's just for fun Just wanted to let you know this one thing is official, as a sort of... food for thought
Since the only thing I know about Tactics is that Cloud Strife shows up (putting it in the general timeframe of the Compilation), this kind of tidbit definitely helps me with my theory.

@Maybee, bit of an issue with your timeline: all of the world's summons and magic are permanently destroyed at the end of VI; if nothing else, that one should be after IX. (I'm assuming your timeline uses four separate worlds)