| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.59/5 | 4.35/5 |
| Vol 2 | 2.59/5 | 4.60/5 |
| Vol 3 | 2.25/5 | 3.53/5 |
| Vol 4 | 2.58/5 | 3.87/5 |
| Vol 5 | 2.56/5 | 4.38/5 |
| Vol 6 | 2.74/5 | 4.41/5 |
| Vol 7 | 2.24/5 | 3.85/5 |
| Vol 8 | 2.69/5 | 4.02/5 |
| Vol 9 | 2.38/5 | 4.41/5 |
| Vol 10 | 2.77/5 | 4.44/5 |
| Vol 11 | 2.91/5 | 4.56/5 |
| Vol 12 | 3.01/5 | 4.67/5 |
| Overall | 2.61/5 | 4.67/5 |