(9)Birth of a God... my second fave battle theme in the game, and it has the greatest beat in a battle theme EVER. (yay for hemiola/bass piano) Close call, though.
(4)Fight On!.... I hate to see stuff like Highwind move on. Meanwhile, Aeris' Theme and Bombing Mission will likely fall. Uematsu's battle themes have a tendency to improve immensely in the second half. I especially love how the loop for Fight On! wraps up with that brief ascending/descending line.
(3)The Nightmare Begins
(2)Cid's Theme....yay.
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"Ah, a party! We haven't had one of those! It could be fun! So... what is a party?" "Well, you drink punch and eat CAKE! ...I think."