I remember years ago there was a freeshard dedicated to duels, 2v2, 3v3, 4v4, and so on. You would form a group then port to a designated arena, or there was a choice of places you could go, I don't really remember - but they were closed off areas where only your fight could happen. Maybe this could be something you could implement later on down the line for practicing moves or fighting for the fun of it (no RPs or extremely reduced RPs). I mean, it's far from live-like and may not be part of your vision but it's something to consider.I think it could help people practice for real fights, and I remember it being extremely fun.