I FC'd Ryougen no Mai on half time lol, as if I'm really going to be able to do this on no mods >_>The map's pretty standard once you start grinding your teeth on it, except for some parts that I'm still annoyed at which I will encircle in the chart below (there are 4 circles I put, and explanation of why I'm frustrated is below the image):

1.) Uh, who wouldn't be frustrated by that? It's clearly 1/6 abuse.
2.) It just kinda ticks me off how it's actually the left hand that stabilizes on this one. The number of notes on a standard stream, which is 9, feels very weird to hear on Ryougen no Mai's music on this part.
3.) The dreaded kiai part. If you've been grinding your teeth on this part, you'll notice how it's full of even-numbered streams, and adjust accordingly. But this particular stream in between is only 7 notes, which is odd-numbered, and can potentially foil your left-right properness. This is the part I'm most frustrated about, mainly because it only contains anti-Zekira stream v1, while its adjacent notes have both v1 and v2 which my sense of rhythm adapts to too quickly, and suddenly 'wtf 7 note stream'
4.) I didn't encircle the notes, but rather the sequences. This entire sequence is full of even numbered streams, which means no problem. But since it's even-numbered and assuming you're doing proper left-right, you'll be starting each stream with the same hand you started the others with, which naturally is left-right-left-right-blank-left-etc. This 'blank', I seem to omit quite often and I frequently go too fast thinking that these notes are actually clustered, leading me to miss near the end just because I've been pressing too hard.
I cropped up the chart here on osu! to only the kiai part and been practicing it like crazy. So far here's only as far as I got:

I ended with 133x combo, yeah, meaning I did survive that last sequence #80-83 without misses.
I have to admire this chart; it's teaching me how to read notes so fast. I just really need to know why the hell those 1/6s are there >_>