Lenen Evanescent Existence - Unreal Stage 5 No-miss No-bomb No-flashbomb (Tsubakura)
The stage portion is... rough. Kill everything that shows up as soon as you can, or you'll be overwhelmed. It's pretty much entirely memorywork; but, with that said, there's still a major diceroll right at the first half of the stage where the two columns of fairies fly up from below and blast stuff all over. If you can get that done, then the stage portion's kinda like a rhythm game. Follow the music, and slay all that cross your path!
For the midboss spell, "Positive & Negative", just remember the first flip is horizontal; the second is vertical. Remember to hug the bottom right ASAP once the attack ends, so that you can kill the incoming fairies.
Ambiguously Paper-thin Archaeologist, Shitodo Kuroji
Nonspell (NS) 1: Aimed shots with random blasts of orbs. Feels like Flandre's 8th NS plus Sakuya's Eternal Meek. Just, uh, dodge, I guess. Tsuba's high speeds give you more freedom to lay down a pounding on Kuroji.
Backstab "The Two-Faced and the Convicted"
There's only ever horizontal flips! So it ain't as scary as you think. Find a strat that works, and stick to it.
NS2: Bouncy bullets. Either take the initiative to dodge through/around them, or read multiple sets of bullets and dodge across the shared gaps formed when they overlap. Take an approach, and stick to it - don't hesitate!
RNA "Retrovirus"
Stay in the middle-bottom, and make vertical dodges. Take it easy.
NS3: The first part's all aimed, so stream accordingly. Don't be too near the edges when the second part starts, lest a bullet bounces off the side into your face.
Overflow "Samidare May Storm"
Dodge and pray. Generally, you want to dash up/down through open vertical gaps whenever possible. Do your best, and cast your fear away!
NS4: Everything's reflecting from side to side... just, uh, end it ASAP.
Disaster Card "End is End"
It's pretty self-explanatory, no?
"Lingering Light of Glory"
Just about the same thing happens every time, so don't panic needlessly. Take it easy, find something that works, and stick to it and give Kuroji a piece of your mind!
check out my pixiv at https://www.pixiv.net/member.php?id=16272537 for Touhou/Len'en art and spell card illustrations uwu