| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.91/5 | 4.49/5 |
| Vol 2 | 3.10/5 | 4.47/5 |
| Vol 3 | 2.62/5 | 4.41/5 |
| Vol 4 | 3.10/5 | 4.46/5 |
| Vol 5 | 3.71/5 | 4.58/5 |
| Vol 6 | 3.90/5 | 4.59/5 |
| Vol 7 | 3.06/5 | 4.48/5 |
| Vol 8 | 3.76/5 | 4.57/5 |
| Vol 9 | 2.80/5 | 4.41/5 |
| Vol 10 | 3.23/5 | 4.45/5 |
| Vol 11 | 3.00/5 | 4.48/5 |
| Vol 12 | 2.61/5 | 4.40/5 |
| Overall | 3.15/5 | 4.59/5 |