Solmyr, Demeer, and Aislin are cheaters (and/or) kamikazes; do the rest have a right to exist?

Mathematics is certainly an exact science, but in practice, things look a bit different. A hero crawling around the map of Solmyr without logic, without mana, or with mana running out, losing troops in every battle, afraid to take on Gnomes, Consuls, or Hives. And a flying fighter like Kirr, or Gunnara with expert logistics, a ton of artifacts, twice the level, and often even with magical stats like Solmyr.