[Touhou LostWord] vs L1 Ibaraki-Douji's Arm DS - Purple Heart Farm (

Character set-up at 0:08. Combat at 0:40. See description below for turn-by-turn transcript.
For whatever reason, Lady Mima was nowhere to be found so I found a Gatekeeper instead to take her place.
Apologies for taking a while on making the Purple Heart Farm video for this stage. Trying to luck farm vs C3 Kogasa DS took up a lot of priority... I need to get more than just two luck 100 units, haha.
I'm still a bit unsure whether or not I should pull for MVKasen or just save SC for 3rd Anni. ...Please help, it's been weighing on me for a while.
☆☆ Character Set-Up ☆☆
[F1 Reimu]
[E1 Flandre]
[B3 Hecatia]
All skills maxed. Stat+100 refers to superior enhancements made on a character.
F1 Reimu: 5* MLB - Purple Heart, Rank 4 - Yin ATK+100, Yin DEF+100
E1 Flandre: 5* MLB Rebirthed - Purple Heart, Rank 5 - Yin ATK+100
B3 Hecatia: 5* MLB - Purple Heart, Rank 4 - Yin/Yang ATK+100, Yin DEF+100
☆☆ Rules ☆☆
Red - II, III, IV
Blue - I, II, III
☆☆ Story Cards ☆☆
F1 Reimu - Yin Hard*, DST, Yin Hard*, Kaguya's Moonlit Fest, BTB: Reimu
E1 Flandre RE - Yin Slice*, Yin Slice*, Yin Slice*, Yin Slice*, Tenma Mountain
B3 Hecatia - Tenma Mountain, Yin Hard*, Yin Hard*, Yin Hard*, Lunatic Red Eyes
Notes:
- E1 Flandre RE likely can use UBT just fine, may need to adjust gauge 2 strat if you do
☆☆☆ Strat ☆☆☆
Turn 1:
(Hecatia uses skill 3 first, then Reimu uses skill 2)
Reimu - Use skill 2, 2p SC2
Flandre - Graze once, use skills 1-2, 3p LW
Hecatia - Graze twice, use skills 2-3, 1p SC1 on Kasen Arm
✣ Gauge 1 Broken ✣
Turn 2:
Reimu - Use skill 3 on Yuugi, 3p SC4
Flandre - 2p Spread Shot (why not)
Hecatia - 3p LW
✣ Gauge 2 Broken ✣
Turn 3:
Reimu - Use skill 1, 3p LW
Flandre - Graze thrice, use skill 3, 3p Focus Shot
Hecatia - Graze thrice, use skills 1-2, 3p Focus Shot
Duration: 66 sec (no exhaust) / 67 sec (exhaust)

[@DavidFoxfire]

You might need to provide a definition of what 'Yin Hard' and 'Yin Slice' are. Thanks in advance.

[@countesstimpani8233]

Apologies for a lack of definition. I'll try providing definitions in future videos.
So each equipped story card gives 2 numeric stats to whoever is using the card. So...
Yin Hard* - any story card with Yin ATK & Yin DEF stats
Yin Slice* - any story card with Yin ATK & Agility stats