Menty, what if I told you that you don't necessarily have to make an RPG just for the sake of combat?
In my opinion, every expedition has these skills, and no one has ever used them.
I didn't quite understand Menty's point about evasion and accuracy. Do they just affect the damage dealt?
1) increases the damage spread
2) with maximum spread, increases the chance of complete evasion.
Accuracy:
1) reduces the damage spread
2) with minimum damage spread, increases the chance of a critical hit.
In other words, this mechanic plays with the spreads and additionally introduces the concept of "partial evasion" from an effective point of view.
However, I might still give chances for complete evasion/critical hit, and not just at maximum/minimum spread. This would complicate the system, but from a certain point of view, it could also be done.