[Touhou LostWord] vs C5 Koishi DS - Lv120 clear!

Combat at 0:00. Character set-up at 2:17.
We get to investigate some more parallel universes and parallel units today. How fun! Although I feel a bit dampered by the fact that we defeat these parallel selves with the same template as before...
At least the spring fields look very pretty...
If you're wondering if I've gotten anyone for this anniversary: I've got this unit from my pulls! (Unsure if I'd have to use her but she seems nice to have anyway.)
☆☆ Character Set-Up ☆☆
[E1 Flandre RE] 》-----《 [LM1 Mima]
[L80 Kasen] 》-----《 [S2 Satori]
[F1 Koishi] 》-----《 [L80 Kaguya]
E1 Flandre - 5* MLB Rebirth - Purple Heart, Rank 5 - Yin ATK+100
L80 Kasen - 1* LB0 - Purple Heart, Rank 4
F1 Koishi - 5* MLB - Purple Heart, Rank 4 - Yang ATK+100 & Yang DEF+100
LM1 Mima - 5* MLB - Purple Heart, Rank 4 - Yin ATK+100
S2 Satori - 5* MLB - Pink Heart, Rank 4
L80 Kaguya - 1* LB0 - Purple Heart, Rank 4
☆☆ Story Cards ☆☆
E1 Flandre - Yin Slice*, Yin Slice*, Yin Slice*, Yin Slice*, UBT
L80 Kasen - n/a, n/a
F1 Koishi - Yang Hard*, Yang Hard*, Dancer in the Puddle, Yang Hard*, LSaS
LM1 Mima - Yin Slice*, Yin Slice*, Yin Slice*, Yin Slice*, ESP
S2 Satori - DST, n/a, n/a, n/a, SHTTU
L80 Kaguya - n/a, n/a
Notes:
~ Yin Slice = Yin ATK + Agility stat stick
~ Yang Hard = Yang ATK + Yang DEF stat stick
~ L80 Kaguya and S2 Satori could prefer some story cards to enhance her spellcard damage if you're lacking damage.
☆ Basic Idea of This Lv120 Template
- Kasen party buffs the 2 nukers, S2 Satori is switched in
- Nuker #1 nukes gauge 1
- Nuker #2 nukes gauge 2
- Satori unlocks switch bind and the whole backline comes out to debuff then nuke on gauge 3
☆☆☆ Strat ☆☆☆
Turn 1:
(L80 Kasen uses skills 1-2-3, swap out Kasen)
E1 Flandre - Use skills 1-2-3, 3p LW
S2 Satori - Graze twice, 1p SC1 on Koishi
F1 Koishi - Use skills 1-2-3, 2p SC3 on Koishi
Turn 2:
E1 Flandre - anything
S2 Satori - Graze once, SC2 on anyone
F1 Koishi - 3p LW
Turn 3:
(S2 Satori uses skill 3, swap out Koishi, then Flandre)
LM1 Mima - Use skills 1-2-3, 3p LW
S2 Satori - Graze twice, use skills 1-2-3, 3p LW
L80 Kaguya - Use skills 1-2-3, 2p SC1
// All turns will rely on a decent damage roll.