Feel free to prove me wrong if anyone's up to the task.
*stares at Kefit*
While I appreciate the compliment, I won't be proving you wrong any time soon. Timing out Scarlet Gensokyo is a considerably more difficult task than timing out, say, VoWG. I'm not even willing to dabble with the idea unless I can access the card in something like spell practice.
VoWG has a fairly consistent difficulty. Luck doesn't affect the card very much; instead, success is dependant upon understanding how the complex but only mildly variable pattern works so that you can read it at the right times to anticipate where the gaps will be. Timing out VoWG is an exercise in properly reacting to this pattern for about two and a half minutes without a mistake. It's a test of endurance, really.
The difficulty of Scarlet Gensokyo over time varies considerably based upon luck related factors, such as how Remi moves around the screen, how the light bubble waves randomly curve, and how the small bullets decide to fly around after they spawn. There is no complex pattern to learn here, In fact, Scarlet Gensokyo is a very simple pattern that breaks into random unpatterned bullet fields of doom. This means you can't find success on the card by merely familiarizing yourself with how to read and dodge any sort of repeating bullet pattern. Timing out Scarlet Gensokyo is a test of nearly complete on the fly dodging due to all the random factors mentioned above, combined with a luck requirement to avoid BS walls for two and a half minutes. It requires danmaku skill in the purest sense at a very high level combined with the tenacity to try over and over again until you exhibit this skill at the same time as you experience unearthly luck.
All that being said, Scarlet Gensokyo is a lot of fun. A lot of bullshit too sometimes, but impossible wall bullshit on the card is fairly uncommon over the course of an ordinary capture. It's one of the few individual attacks in the series that still gives me a really good challenge without being over really quickly (see: Patchy cards).
Anyway, today's rage will be directed at dying about a second before getting a perfect EoSD Lunatic stage five run. Just as well, I suppose, since single stage replays don't save.