Auto-translated
Everything is correct, but I would rework the hero classes. For example, instead of an engineer, there should be a Rune Mage, who would have skills that drop more often.
1. Mechanics (rune machines)
2. Summoning magic (rune shield)
3. Leadership (rune harmony)
and other skills that have a connection with runes.
Then the heroes would be:
Warriors
1. Ibba
2. Ingvar
3. Karl
Rune Mages
1. Brand
2. Inga
3. Erling
Hermits
1. Sveya
2. Helmar
Erling could be made a hermit because he strengthens rune, fire, and ice mages, and Tolgar could be added to the rune mages.