Azure Striker Gunvolt
okay, I decided to cash in my kudos at the final checkpoint instead of the boss because I wasn't confident I could beat it without getting hit and also I need to complete the 'S rank or higher' challenge before the 'S+ rank' challenge shows up. The multiplier you get with the higher kudos really does add a ton, even just cashing in right before the boss left me 150,000 points below the S+ rank threshold.
I decided to change my shoot button to X because shooting while using the flashfield and also jumping all at the same time wasn't working for me when it was ABY. ABX is significantly easier after adjusting to the change, my thumb covers those buttons pretty much all the time by default.