I captured Kaguya's 4th Last Spell a few times in Spell Practice using the scoring method. The thought of having to get it at the end of a run though would probably cause me to screw it up.
Outside of that, not much else in the realm of IN scoring outside of getting a little better at the Three Treasures milking. I'll watch some scoring replays soon. Not sure if I'll stick with Border team, or switch to Netherworld Team or Scarlet Team. Scarlet Team would require me to relearn the game entirely, but IIRC it's the best scoring team, but then I'd have to learn a really hard stage 4 boss and midboss fight instead of the mostly easy Marisa.
Also, not an accomplishment yet, but Remilia's damage seems to help quite a bit against a few of Kaguya's spells, though Scarlet Team hitbox does not. I never took the thought seriously before, but I may try to perfect FinalB, all 5 Last Spells included. The hard part with Scarlet Team seems more actually getting the Last Spell rush, which I've never captured all 5 in a row. I have not no miss no bombed her yet(though I got close once with border team).
Scarlet Team also trivializes Earth in a Pot, and Omoikane Brain, so although I have no plans to perfect Eirin, I might try to actually no death the stage sometime.