| Progress | Difficulty | Peak |
|---|---|---|
| Vol 1-2 | 3.35/5 | 4.61/5 |
| Vol 3-4 | 2.36/5 | 4.58/5 |
| Vol 5-6 | 3.36/5 | 4.62/5 |
| Vol 7-8 | 1.84/5 | 4.55/5 |
| Vol 9-10 | 1.91/5 | 4.51/5 |
| Vol 11-12 | 2.10/5 | 4.55/5 |
| Vol 13-14 | 1.86/5 | 4.47/5 |
| Vol 15-16 | 1.76/5 | 4.42/5 |
| Vol 17-18 | 1.90/5 | 4.49/5 |
| Vol 19-20 | 1.88/5 | 4.55/5 |
| Vol 21-22 | 1.76/5 | 4.44/5 |
| Vol 23-24 | 1.71/5 | 4.47/5 |
| Vol 25-26 | 1.93/5 | 4.53/5 |
| Vol 27-28 | 1.80/5 | 4.49/5 |
| Vol 29-30 | 1.72/5 | 4.44/5 |
| Overall | 2.08/5 | 4.62/5 |