| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1 | 2.96/5 | 4.54/5 |
| Vol 2 | 3.15/5 | 4.52/5 |
| Vol 3 | 2.67/5 | 4.46/5 |
| Vol 4 | 3.15/5 | 4.51/5 |
| Vol 5 | 3.76/5 | 4.63/5 |
| Vol 6 | 3.95/5 | 4.64/5 |
| Vol 7 | 3.11/5 | 4.53/5 |
| Vol 8 | 3.81/5 | 4.62/5 |
| Vol 9 | 2.85/5 | 4.46/5 |
| Vol 10 | 3.28/5 | 4.50/5 |
| Vol 11 | 3.05/5 | 4.53/5 |
| Vol 12 | 2.66/5 | 4.45/5 |
| Overall | 3.21/5 | 4.64/5 |