Personally, stage 4 seems pretty easy for me in most games. Patchouli, Murasa, Seiga+Yoshika are fairly easy to deal with, Satori and Aya are trickier, but still doable. Prismrivers and especially Reimu/Marisa are the real deal, but that I wouldn't call "a tradition".
On the other hand, stage 5... ZOMBIE FAIRIES, WEAVING GHOST PATTERNS, KNIVES, CURVY LASERS. The only exception is probably Reisen, who could easily swap with Reimu/Marisa and the difficulty of both would be suddenly just right.
So this is why she is an evil hermit. Now I feel even worse for beating up Yoshika!
Hmmm...
That's right, you're a good girl!For reeeaaaal?
Am I wonderfuuul?WARNING:
This manga contains spoilers for Ten DesiresGood girl!Good girl? I'm a good girl?Wonderful, wonderful!TurnOoo-kaaay!
C'mere!!Heypet petOkay, you're a good girl, so let's go beat her up! ♥You're up early...
Good girl, good girl! ♥