Frozen Ray
Both Fascinations, Legend of Max, MaxX Unlimited, Paranoia Respect and Paranoia Survivor Heavy/Oni.
Chaos OMES is also pretty good at kicking my a**.
Edit: Oh yeah these are just the songs I haven't passed.
i should train more.. i used to be able to clear MaxX Unlimited (barely, but i pass it)
paranoia survivor i can clear, not easily but i can.
Paranoia survivor max is basicly paranoia survivor + mirror + 20BPMextra speed.
i would love to be able to pass the fascination songs, max300 super max-me-mix heavy/oni, TLOM and paranioa -respect-.
PSMO can suck my B****, i dont care about that one.
and i agree with lunar, its much more fun when you can challenge yourself