Goal: Full PM on PST

I'm a casual rhythm gamer at around the appropriate level of 9-9+, so I can only fill in PMs on PST, and as expected, this is the only one left. The ones that gave me trouble so far were: Testify ← The fact that I could even PM this song is what made me aim for full PMs. Honestly, even FR isn't stable. Arghena ← Honestly, FR is also, etc. Designant. ← Honestly, etc. Multidimensional Universe Fusion Theory ← Why did I get so stuck on this, when it's not even the main boss? So I don't know how many years it will take until I can PM this one either. Maybe I should quit 6-key.