Chances are, I'm not going to be running TOP anytime soon (at least, not unless I get super-connected in short order or end up in just the right FC), but I did kind of come up with a playlist for the fight, sort of like how I used to do with WoW raids, while watching JoCat do so. All of these songs are from DiGiTAL WiNG's early album Eternal Fantasia (which I know I used in WoW a long time ago, but it's a very good album). Some of these are kind of mentally tweaked to fit into the flow of the fight, so just playing these songs as-is wouldn't quite work out, but still.
Phase 1: Guardian, at about 0:23 (using the intro to that song as kind of a hype-up)
Phase 2: Guardian, at about 2:43
Phase 3: 素敵なワン・ツー・スリー (Splendid One-Two-Three), but extend the part between 2:30 and 2:47 a few extra bars
Phase 4: 素敵なワン・ツー・スリー from 2:47, and extend the song a few extra bars
Phase 5: ETERNAL WiNG
Cutscene: a very short cut of 発芽年鑑 (Germed Almanac)
Phase 6: 有明は午前4時 (Dawn at 4 o'clock)
I find that creating my own playlist for a raid helps me better keep track of where the fight should be at. While the game designers can usually pick good music to set the tone and such (and TOP phase 5 is a banger, too), it's also typically designed to be very background-y and loop for the duration of the fight. But, pick a song that's just over five minutes for a fight/phase that's about that long, and suddenly, you've got a progress meter of a song.
Anyway, I'm goin'a bed.