After playing the stage off and on for about a month and a half-two months, making it to her third-to-last or second-to-last spells a few times, and overall getting myself WRECKED by her...FINALLY, Yukari goes down!
Phantasm clear with Reimu B. Finally I can say I beat every mode(Not every difficulty, of course.) in PCB!
...I DID bomb DBF for all five waves due to either panicking(I was NOT losing after making it that far!) or hitting something(At least one of those bombs was a deathbomb), but still, I got the clear which is all I really wanted.
Phew. now to grind on Hard to try and get better than a 5cc, haha.