I've seen the video, and tried to 1cc with Youmu, without cards. So far, I've lost my first life on Yukari's final spellcard (and the second one on it as well, due to not having dealt enough damage on it right at the start -- Yukari keeps moving around, avoiding my airborne bullets, and I haven't memorized the way to do this spellcard until it was too late). The B projectiles aren't as damaging as the 6C ones, but their hitstun can be helpful at times.
Also, Youmu's backdash has invincibility frames (I think it's something from IaMP), with it you can avoid Komachi's second-to-last spellcard's damaging attack even within the slowdown field.
Against Yukari's
second-to-last spellcard edit: third-to-last, it's easy-peasy (this is a quote from Marion, from Gunbird, that I liked
![Cheesy :D](/forum/Smileys/default/cheesy.gif)
), when you come prepared for it. Stay right below her, wait until she has fired an attack (there are 7 per wave), hj8 (you'll be inside the circle), dash downwards in order to go down faster, then repeat until she has fired her last attack. Then you do j2A instead of j2D.
Donut, you shouldn't worry about the non-spellcard sections in this video. They're easier than the spellcards.
And finally, even though it's possible to clear the Story Mode without using cards, I still find them irritating, because there will be many cases where I simply won't be able to capture them (even though there's no score in this game), because the game randomly gives out attack opportunities (again, see my Suika replay against Iku's last pattern for an example). Finally, in this run (which I was too frustrated to bother saving a replay from it), I was able to capture Reimu's final spellcard, by cornering myself, shooting the orbs to weaken them (with 6B), grazing the orbs that came towards me (with hj8 -> j2D; I jump at least higher than a normal jump's height, before using j2D, because the orbs are dense enough to hit me after I've grazed them and landed, so I make them bounce upwards and graze downwards) and occasionally using 5B when there are few orbs between both characters, so that Reimu falls on these projectiles after firing the orbs, and before teleporting again.