| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.98/5 | 3.95/5 |
| Vol 2 | 2.82/5 | 4.16/5 |
| Vol 3 | 2.84/5 | 4.18/5 |
| Vol 4 | 3.15/5 | 4.28/5 |
| Vol 5 | 3.27/5 | 4.24/5 |
| Vol 6 | 3.28/5 | 4.32/5 |
| Vol 7 | 3.17/5 | 4.20/5 |
| Vol 8 | 3.12/5 | 4.12/5 |
| Vol 9 | 3.50/5 | 4.41/5 |
| Vol 10 | 3.40/5 | 4.32/5 |
| Vol 11 | 3.33/5 | 4.33/5 |
| Overall | 3.18/5 | 4.41/5 |