| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-2 | 2.48/5 | 4.54/5 |
| Vol 3-4 | 2.00/5 | 4.27/5 |
| Vol 5-6 | 2.02/5 | 4.42/5 |
| Vol 7-8 | 1.96/5 | 4.51/5 |
| Vol 9-10 | 1.97/5 | 4.49/5 |
| Vol 11-12 | 1.98/5 | 4.38/5 |
| Vol 13-14 | 1.90/5 | 4.44/5 |
| Vol 15-16 | 2.52/5 | 4.55/5 |
| Vol 17-18 | 1.98/5 | 4.48/5 |
| Vol 19-20 | 2.00/5 | 4.45/5 |
| Vol 21-22 | 2.16/5 | 4.51/5 |
| Vol 23-24 | 2.50/5 | 4.55/5 |
| Vol 25-26 | 1.90/5 | 4.33/5 |
| Overall | 2.11/5 | 4.55/5 |