I am aware that Ashes of Creation will feature 1 vs 1 dueling mechanics.
I always find it very disappointing when MMOs don't implement such a basic feature, and as a PVP enthusiast myself this is a great way to have fun, practice and even making community driven events.
I haven't seen any specifics on duels, so I would like to make some suggestions that I think are easy to implement and will really add to the game.
I like the normal 1v1 open world duels, where you challenge a player for a duel and once accepted you fight whitin a certain range in a circle, with no penalties and no deaths of course, however I would love to see group duels as well, 2v2 duels and 3v3 duels
Or uneven duels, for example 1 vs 3 dueling or any other numbers, I think this could easily be done by having group duels, and setting up the party members to whatever we'd like

That's my suggestion!