These can be based on the tiers from wiki sites, such as https://w.atwiki.jp/bemani2sp11/pages/19.html
This breaks the charts down into tiers ranging from F (easy) to S+ (hard). TOs seem to like the idea of at the very least breaking them into groups of three:
- Lower 12s: F to C tier
- Mid 12s: B to A
- Upper 12s: A+ and above
These can be based on the tiers from wiki sites, such as https://w.atwiki.jp/bemani2sp11/pages/19.html
This breaks the charts down into tiers ranging from F (easy) to S+ (hard). TOs seem to like the idea of at the very least breaking them into groups of three: