Junta Momonari would have a considerable advantage over the Touhou girls
..considering that Reimu alone could become invincible if she wished so, what's to say about the others.
Curious fact: In Saint Seiya, there are lots of characters that can reach the speed of light (unless they're liars), however it takes the combined effort of a number of them to create an artificial sun in Hades. See the irony? (what's to say about Shinki, then?)
Curious fact #2: my original (non Touhou-related) character could handle Touhou and Type Moon together by overwhelming them with more numerous and powerful copies of themselves, just to start testing them.