I have never played the final fantasy games, although I have never played them I imagine this would fit very well, but this sounds like something I would hear in those games. I'm not sue if you were going for a realistic sound from your instruments, but pretty much all of the instruments sounds pretty bad :/ However, I won't take points off for this because that isn't your fault, you work with what you can :P I really get the feeling that I am in a turn based video game. You captured that feeling very well. I thought that the drum mix could be turned up a bit more, other than that, there are really no mixing problems. The song felt a little empty though, I wanted to feel that power hitting me the entire time but I just never felt it if you know what I mean. Maybe the bass was too quiet? I'm not sure, but I just didn't get that feeling I was looking for. You change the song up a ton so it never ever gets boring, I am interested the entire time, structurally, the song is fantastic, so major props to that. But overall, the piece is pretty awesome, so nice work!
Also, it'd be awesome if you could check out my original song "The Return" and give feedback!