Put HS in normal, sample Hs can be confusing for player while they are playing. You can change them by going to the audio menu in timing section and click the normal case.
I'm not really a fan of the use of sliders, especially in the higher difficulty when they are also used for 1/4 patterns, so I highly recommend replacing them with normal notes, spinners or rest times:
MUZUKASHII:
ONI:
INNER ONI:
By the way, it's not necessary to follow strictly what I said, but I still recommend to avoid them in most cases.
I think this should have went in reviews
I would change it for you, but I don't want to earn kds on your behalf, so I recommend posting this on the review tab and marking each point as a suggestion (because none of this is unrankable) so it's easier to earn kds and show each mapper what they need to change. this also opens separate points for future discussion
Muzukashii has a drain time issue (and density problems) when compared to Futsuu and Kantan.
To fix this, either add notes between 01:22:227 and 01:31:227 for consistency with the lower diffs OR remove the notes from Futsuu and Kantan with the timestamps that I gave for Muzu (the second option is recommended since guest diffs do this aswell).
Also try to make sure that the finishers, spinners and sliders are the same across these diffs (except for guest difficulties).
For density thing (at least for me), avoid using triplets next to each others and try to only use them during kiais.