| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.59/5 | 4.44/5 |
| Vol 2 | 2.15/5 | 3.99/5 |
| Vol 3 | 2.51/5 | 4.40/5 |
| Vol 4 | 2.41/5 | 3.64/5 |
| Vol 5 | 2.77/5 | 4.58/5 |
| Vol 6 | 2.64/5 | 4.40/5 |
| Vol 7 | 2.39/5 | 4.07/5 |
| Vol 8 | 2.17/5 | 3.15/5 |
| Vol 9 | 2.19/5 | 3.17/5 |
| Vol 10 | 2.46/5 | 4.31/5 |
| Vol 11 | 2.54/5 | 4.42/5 |
| Overall | 2.45/5 | 4.58/5 |