Levski Sofia played 38 league seasons and cup tournaments in the data, 1966 to 2011. Success weighs every finish by how hard that competition was to win; Efficiency is the share of what the club could have won that it did win; Edge compares that with an average participant (×1.00).
| 577 | Fortuna Köln (Germany) | 4.4 |
| 578 | Reggiana (Italy) | 4.4 |
| 579 | São Cristovão (Brazil) | 4.4 |
| 580 | Levski Sofia (BUL) | 4.4 |
| 581 | Burgos CF (Spain) | 4.4 |
| 582 | Wrexham (England) | 4.4 |
| 583 | Rot-Weiß Oberhausen (Germany) | 4.4 |
More: the world top 200