[Fate/Grand Order] Okita Alter Solos Akechi Mitsuhide

AKA Goopy, Demon King of the Sixth Heaven
... with a teeny bit of help from kouhai with a shield and spartan king with a shield.
General Strategy: Because Okita Alter is an alter ego (ha), she receives neutral damage rather than resisted damage-that means she can't take much hits. Break Goopy's bars as fast as possible before he can NP otherwise he will remove all current buffs on Okitan and it's game over from there.
Goopy will debuff you every time his bar breaks so that your next buff will be nullified. First bar break also has buster down debuff, second bar break has NP damage down debuff. To get around this, I had to make sure Okitan's Buster/Quick up was already activated the turn before his first bar break and that she will NP him twice so that he receives two buster resist downs by the third bar.
Before attempting the solo: Okita is an alter ego... she deals double damage against casters plus she gets 100% damage bonus during the event, should be easy to solo this :D
After attempting: F*** this GOOP MONSTER! I regret everything!
Music Used:
Fate/Grand Order OST - Grand Battle (GudaGuda Meiji Ishin)
Umineko BGM - Yomitsu Hirasaka Corruption [Requiem]