Nice to see your feeling better Ikari, though I'll need to give those Status Effects a proper rad later as I had to skim so you guys wouldn't get too far ahead of me post wise
Anyway, I watched that
Reimu vs Remelia fight again and saw that when Remelia used her Chains of Fate, just before they dissapear, Reimu grinds on em for a bit, which is pretty cool yeah, though what I was thinking is that depending on the type of danmaku, there could be some kind of physical interaction with it, such as Remelia's Chains of Fate being actual Physical chains that can be grind on, but more energy based Danmaku, such as a Majority of Utsuho's Danmaku can't be directly touched Full Stop as all of hers a Energy Based.
Also in this
Marisa vs Flandre Preview trailer, one thing you'll notice is that they're both constantly moving through the mansion, though in this case it's more a case of Flandre playing a game of "Tag" with Marisa though it's still something we could do, also at the end of the video, FLan can be seen deflecting Marisa's Danmaku with L?vateinn, which brings me to my next thing, in essentially all Touhou Dogfight video's, whoever takes the first hit seems to be the loser of that round, though they seem to move on to the next spellcard, regardless of who was hit, so essentially, Danmaku Battles seem to be a 1 Hit and lose scenario for both combatants, though it seems that the challenger is more limited to what they can use.
And I hit post before I was finished writing my post instead of preview :V