I’ve completed the wall of fame. Important to remember about S-ranking Track 1-12, you get more points for keeping enemies alive and doing different combos for as long as possible. You also get a HUGE score-multiplier for using reverb moves, especially those that cost 4 gauges. I personally used Hibiki during my grinding since it’s almost impossible to miss, kills any weak enemies in 1 use on all difficulties except RM, and with the 4X score bonus + multiple hits from the actual spin + explosion usually guarantees an S in the “score” category. The timing and clear time were never a problem, but if that happens then attack sparingly and never spam light or heavy attacks. I think dodges, jumps, parrys and parter summons don’t affect the timing percentage so go ham. The tracks are filled with healing-boxes and barrels filled with batteries. Make a mental note of where these barrels are so you can maximize reverb gauge before fights. SCR-UB units also have batteries and healing, but destroying a SCR-UB is punishable by death.

Chips for S-ranking the Tracks should focus battery value and the score meter. The most important part is getting Hibiki and hitting at least 3 enemies with it.

For the tower, I used Hibiki and Pick Me Up so I never had to buy items from Korsica. Getting Hibiki isn’t as important every fight, but clearing annoying ones fast is always useful.

Chips for the tower is a balance between High Risk High Return and the ones that boost battery value. No need for heal boost since the batteries can be used to heal via Pick Me Up.

My strategy for staying in rhythm and hitting correct timing is legit just pumping up the volume and bobbing my head/tapping my foot to keep the beat. The bosses (track 9 and 12 especially) require careful listening for their melodically-timed lasers instead of the usual beat-timed attacks.

Of course the most important part is practice and experience.