| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-2 | 4.08/5 | 4.64/5 |
| Vol 3-4 | 4.00/5 | 4.64/5 |
| Vol 5-6 | 4.06/5 | 4.63/5 |
| Vol 7-8 | 3.98/5 | 4.64/5 |
| Vol 9-10 | 3.22/5 | 4.58/5 |
| Vol 11-12 | 3.94/5 | 4.67/5 |
| Vol 13-14 | 3.54/5 | 4.64/5 |
| Vol 15-16 | 3.22/5 | 4.58/5 |
| Vol 17-18 | 3.35/5 | 4.63/5 |
| Vol 19-20 | 4.14/5 | 4.66/5 |
| Vol 21-22 | 4.02/5 | 4.61/5 |
| Vol 23-24 | 3.40/5 | 4.58/5 |
| Vol 25-26 | 2.84/5 | 4.49/5 |
| Overall | 3.68/5 | 4.67/5 |