[Touhou LostWord] vs L1 Yuuka DS - Lv120 clear! - (▾30 SP, 3T)

Character set-up at 2:19. See description below for turn-by-turn transcript & comp info.
So apparently, a lot of people have hyped this Yuuka gal to be some supremely terrifying Youkai? I just don't really see how she's scary. I even had to go easy on her for this video by deliberately debricking my whole team...
By the way, I got L80 Kasen. She both impresses and infuriates me at the same time because of her skill 3.
☆☆ Character Set-Up ☆☆
[B3 Hecatia] 》-----《 [Cz1 Marisa]
[L80 Youmu] 》-----《 [L80 Marisa]
[L80 Kaguya] 》-----《 [L80 Kasen]
All skills maxed. Stat+100 refers to superior enhancements made on a character.
B3 Hecatia: 5* MLB - Purple Heart, Rank 4 - Yin & Yang ATK +100, Yin & Yang DEF +100
L80 Youmu: 5* MLB - Purple Heart, Rank 4 - Yin & Yang ATK +100, Yin & Yang DEF +100
L80 Kaguya: 1* LB0 - Purple Heart, Rank 4
Cz1 Marisa: 5* MLB - Pink Heart, Rank 5 - Yang ATK +100
L80 Marisa: 5* MLB - Purple Heart, Rank 5 - Yang ATK +100
L80 Kasen: 1* LB0 - Blue Heart, Rank 4
Note: Cz1 Marisa does NOT need to be Pink Heart for the comp to work.
☆☆ Story Cards ☆☆
B3 Hecatia - Yin Hard*, Yin Hard*, Yin Hard*, Yin Hard*, Lunatic Red Eyes
L80 Youmu - Yang*, Yang, Yang*, Yang*, Send Her to the Underworld
L80 Kaguya - n/a, n/a
Cz1 Marisa - Yang Slice*, Yang Slice*, Yang Slice*, Yang Slice*, Red Hot Polaris
L80 Marisa - Yang Slice*, Yang Slice*, Yang Slice*, Yang Slice*, Night-Splitting Light
L80 Kasen - Divine Spirit Tajikarao, n/a
Prioritize the higher agility cards for L80 Marisa.
Shorthands:
~ Yin Hard* - any story card with Yin ATK & Yin DEF stats
~ Yang* - any story card with Yang ATK stats
~ Yang Slice* - any story card with Yang ATK & Agility stats
☆☆☆ Strat ☆☆☆
Turn 1:
Hecatia - Graze twice, use skills 1-2-3, 2p LW
Youmu - Graze thrice, use skills 1-2-3, 3p LW
Kaguya - Graze thrice, use skills 1-2-3, 3p Spread Shot
Turn 2:
(Youmu switch out, then Hecatia switch out, then Kaguya switch out)
Cz1 Marisa - Use skills 1-3, 3p LW
L80 Marisa - Use skills 1-2-3, 3p LW [should attack first]
Kasen - Use skills 1-2-3, 3p SC1
Turn 3:
Cz1 Marisa - Use skill 2, LW
L80 Marisa - Graze thrice, Spread Shot
Kasen - Spread Shot