I think I grabbed this from #modreqs awhile back.
[valuable's Easy]
Raise HP drain by 1 at least, please.
00:05:256 (2,3) - I'm not a fan of stacks in easy difficulties - especially stacks involving sliders. I'll just mention this one though since it seems to be a rather common technique you have used.
00:57:394 (4,1) - Didn't like the overlap here.
Felt a little excessive on the use of spinners to me, but just my thoughts here.
Also didn't like how a lot of this was straight lines and 90 degree turns. It tends to lead to boring patterns. If you're willing to try to aim for more eye-pleasing patterns, I wouldn't hate you for it. ;)
[Normal]
00:28:428 (1) - Mm, kind of iffy for being soon after a spinner. Though considering the difficulty spread, it's probably okay. I think. You sure have a lot of them though. @_@
02:44:980 (1) - Phew, this part is pretty hard for a normal. Maybe throw in some new combos at these two places to give more HP back:
02:50:773 (7) - New combo
02:54:083 (5) - ^
[Insane]
Looked fine, though I would really suggest that you tone this difficulty down a bit (mostly the streams and some of the bigger jumps) and rename it as a hard. Considering your difficulty spread right now, it would serve this mapset as a whole much better that way, imo.
[Holoaz Beat]
OD +1? Streams felt a little easy to 300.
01:31:221 (1) - This combo is running fairly long. Maybe cut it a bit?
The maps are mostly fine on their own, though the set as a whole would benefit greatly if you could tone down the Insane and turn it into a hard. Just my opinion though~