Here’s my totally arbitrary Difficulty Rating standard that I’ve been going with:

Auto 1 Star: 0

Easy 2 Stars: 1-10

Normal 3 Stars: 11-20

Hard 4/5 Stars: 21-30

Harder 6/7 Stars: 31-40

Insane 8/9 Stars: 41-50

Easy Demon: 51-60

Medium Demon: 61-70

Hard Demon: 71-80

Insane Demon: 81-90

Extreme Demon: 91-100

I agree it’s totally arbitrary and kind of meaningless compared to the other ratings.

Would be helpful to have some reference levels to gauge what is typically considered each difficulty range (similar to GDDL)