IRyS should jump right into X-2 without touching X just so we might have the slightest chance of another FF song they can add to the library of songs they can sing in karaoke that isn't just Suteki Da Ne AND have another song that is actually in English. That and she can figure out the shipping dynamic between Nooj and Baralai.
https://www.youtube.com/watch?v=8QPiFhWVRDk 