I am reclassifying this diff to Expert since it's subjective if it will fit the ranking guidelines of Insane.

All notes regarding these Expert guidelines will be posted as responses to this main post.

Insane diff mania guidelines:
Met - ✔️
Not met but has reason - 🟡
Not met - ❌
idk - ❓

✔️Avoid unjustified spikes in difficulty. Difficulty should be representative of the song's intensity.
✔️Long-term slider velocity changes should be between 0.60x and 1.10x.

I am upgrading this diff to Insane to better fit ranking guidelines. I have created a new Hard diff "Stellar" that will complete the set making 4 total diffs, N - H - I - E.

All notes regarding these Insane guidelines will be posted as responses to this main post.

Insane diff mania guidelines:
Met - ✔️
Not met but has reason - 🟡
Not met - ❌
idk - ❓

✔️Avoid unjustified spikes in difficulty
❓Avoid using split rolls or any kind of complicated 1/8 streams lasting longer than 4 beats
✔️Avoid using 1/6 or higher snap long note streams
✔️Long-term slider velocity changes should be between 0.70x and 1.10x
✔️Slider Velocity gimmicks should be reactable within 1/4 of a beat or more when unnormalised and 1/2 of a beat or more when normalised
✔️Avoid using 1/4 jacks with 3+ notes in the middle of chordstream
✔️Bracket streams should be used sparingly.

In the middle of a long chord stream with a chord every...
...1/1, there should not be more than 3 notes, except at the beginning/end of a stream, when 4 is acceptable.
...1/2, there should not be more than 2 notes.
...1/4, it's recommended to use a single note instead unless there is extremely clear musical justification.

Hard diff mania guidelines:
Met - ✔️
Not met but has reason - 🟡
Not met - ❌
idk - ❓
don't think this should be a guideline - 🟥

✔️HP and OD values should not be higher than 8
✔️Note snappings of consecutive 1/8 and higher should not be used
❓Long streams of 1/4 notes should include, at minimum, a 1/2 pause where natural to implement after every musical phrase
🟥Chords within 1/4 streams should be at least 1/1 beat apart from each other
✔️Avoid using chords in the middle of 1/6 streams
✔️Avoid anchors consisting of five or more notes
✔️1/4 Jack usage is discouraged
✔️Avoid using more than 9 consecutive notes in a trill
✔️Long notes should be held for at least 1/4 of a beat
✔️Objects directly after short-term slider velocity changes should appear at the beatmap's normal scroll speed
✔️Long-term slider velocity changes should be between 0.8x and 1.10x
✔️Slider Velocity gimmicks should be reactable within 1/2 of a beat or more
✔️Avoid chords with more than 4 notes
🟥Keep chord distance in a chordstream at a 1/1 or higher interval
🟥Occasional hands can be used in streams, so long as they are separated by at least one measure (4 beats)