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Where is the option for a super ability for the Barbarians?
I'll arrange the abilities, taking into account the Barbarians:
1. Mages
2-3. Elves-Gnomes
4. Demons
5. Barbarians
6. Necropolis
7. Dark Elves
8. Humans (ability is weak)
It's simply pointless to gather a super ability with Humans.
It's too problematic with Mages and Gnomes (Mages play half the game without magic, Gnomes get summoning with 4%). Elves and Demons should take logistics (although surprise attack is a very useful ability). Barbarians prioritize attack and leadership, and for Warlocks, chaos and spell power are a priority, so the chance of gathering a super ability is higher. Although many classes have heroes whose super ability may appear on level 23. Necromancers don't have spell power, and they can't raise knowledge significantly through education.
So, you can gather abilities, but in most cases, it will hinder the hero's development. Therefore, if the game lasts less than 2 months, forget about the super ability.