After countless trial and error, finally made a way to save 10 frames compared to WIP83v6.
The initial problem was the stage 4-2 bitch which threw the worst knives, but luckily I was right at the 127 timer so a different route (interrupting his knife and jumping up from below him) let me keep it.
Syncs up to stage 5-1. 410 frames faster than feos initial attempt.
- reminder to myself: remove 5-1 first bird boost because we won't have enough hp on stage 5-2