Hey, don't know how this Quest exactly is called, i talk about this "Choosen One" Quest in this Arena. I and a friend of mine, who played through it, encountered if we decide to not fight, or only one want to fight, we teleported back to the beginning where the People stands, but are forced into Combat... Of course there is the "make peace"-Option, but you should that fix that due when new Players play this Game, and don't know that, they will most likely try to fight. And even the fight itself was kinda bugged - because me and my friend couldn't fight "directly" against each other, his Companion(Sibelle) as well his incarnation could attack me. While i only could attack Sibelle. And he only Lohse(my Companion).
The next thing is, you should do something about the Pitfight against Summoner PCs. If you decide to fight against your Friend(s) and one of them play Summoner, you are pretty much fucked up, due the Totems from the (NPC) Fight before, still stands there. (so they are kinda presummoned as well his incarnate) - which gives the Summoner an huge Advantage in this Duell. The Arena should be cleared up if people decide to fight each other....