Some classes have special skills which could seriously turn the odds of a fight if they succeed. Especially during pkill fights. A succeeded wither by Kampfer for example, will do 72 damage to a paladin AND stuns him for like 9 secs. There is no fight, it's a one way slaughter (Kampfer's day cannot be ruined if this happens), which one would not expect if they hear that two that belong strongest in lands fight eachother
Now since they are so powerful, i was thinking that it sounds more realistic if a player becomes more skilled in using the skill if he practises it more, just like a weapon proficiency. Maybe start only with offensive skills like touch, turn and wither, but maybe also with semi-offensive like haste and berserk and defensive, like barkskin and pray.
Your thoughts!