I know that Pathfinder has some quite sophisticated rules on Duels, and those for the core of my House Rules. Note, however that those are general rules of duelling, and are modified by the Challenge Duel rules described below.
PvP and Arena style games aren’t my thing, I don’t really enjoy the basic skirmish level war gaming that has become ‘combat’ in modern versions of the game. These rules will stop me getting irritated and annoyed, as I no longer have to watch duels nor wade through pages of pseudo-wargame rules. You will be surprised at just how many people manage to not quite read all of a rule and misapply it. Have fun :}
Note: The walls of the salon are hung with a number of blades and bucklers for use in duels. Rapiers, duelling swords and falcata predominate, but also includes any light piercing blade, from the simple or martial lists, that is primarily used as a melee weapon. All weapons and bucklers are Master work quality, but are not enchanted. They are all partially blunted, and do 50 % lethal damage and 50% Non-Lethal damage. When the total of Lethal and Non-Lethal damage falls below 1 the character is defeated. However, the Non-Lethal damage has disappeared next morning.