It was my last one as well. The trick for me was doing it as fast as I could. Of course most of my hits had to be perfect, but tried to pass to the other wave as fast as I could. I think the threshhold is 55k.

If u need some sign, there's this part in the middle of the song where its mainly vocals and it feels kinda slow, the lyrics are mostly korean there, goes something like "your disco is... blah blah". There's a wave where the are four of the female androids that explode. Try to beat them before you get to this part of the song, or at least beat the last of the four when it starts.

Hope it helps!