I will promisd I will shut up my face.
Some idea
Damege bonus
1 + max(0, (min(skill1, leadership, aiming)^0.8 + median(skill1, leadership, aiming)^0.7 + max(skill1, leadership, aiming)^0.6 − |maxHealth ÷ 100|
Class idea:
The adventurer plan is good.
But i think every character need dual skill...