UFO Hard(and Lunatic)
Stage 1- probably more like Stage 3 for the stage part(on Lunatic, Hard is simple), boss is mostly fine.
Stage 2: Fine for a stage 2(on Hard at least) for the stage, Kogasa should be in stage 4 because that does not belong on stage 2
Stage 3: Typical Stage 5 difficulty
Stage 4: Just how it should be.
Stage 5: What the fuck is this shit? Shou is a fun boss(to watch people get owned by) but complete bullshit and not fun to fight yourself.
Stage 6: Fine for a final stage. Byakuren, So much clipdeath.
Hell, the game clipdeaths you way too much throughout.
Edit: Tried PCB Stage 6 Lunatic Perfect
Die to stage spam(seriously, how the fuck do you do this?), die to Deadly Dance twice, die to Ghost Knives, die to Flowery Soul, Die to Sumizome, die to Resurrection Butterfly. I think I'll stick with final stages that I actually have a chance of perfecting some day(FinalB)