Why is the player trying to graze lots of bullets? I've never heard of anything involving graze.
For entertainment purposes, especially where the grazing will lead to no loss or gain of points.
Also, on the subject of my December TAS, I'll share my screenshot for those who weren't in IRC at the time. There's a good chance it can exceed 18M. I spent my time and effort clearing Makai, so Jigoku is an uncertainty, although it seemed trickier.
The improvements that could be made are a few sacrifices for time bonus, as well as clearing the stages quicker than before and interestingly enough, final boss bullet cancels.
I was also able to produce actual recordings of some perfect stages on another test run being done at 60fps (unlike my 30fps TAS), although the emulator crashed later on and caused the savestates to glitch out. It's generally impossible to perfect under normal conditions due to RNG, thus the emu savestates preserve the saved RNG.
Looks like NP might work better with TAS utilities than my easymode approach, although I can't find any resources on HRtP TAS runs myself.