Dueling is the only place where skill can be quantified, sure most people who go on duel just do it with +3 heavy armour and str builds and blocking is very easy these days, but because it's a 1v1 if you are more skilled than another person, you should still be able to beat them quite easily even if it takes a while.
Battle servers take 0 skill, it's just killing bads and whenever meeting a good player in a 1v1 dragging the fight on til one of you backpedals into your team and beats them with a numerical advantage. Not to mention ranged and cavalry players having a massive advantage and being able to effectively neutralize any single player on the enemy team if they want to be that much of an asshole by targeting them every round until they're dead.
