#847 [invidious] Scorn Arena expects 1 v. 1 duels, but >1 v. >1 possible

[SilverNexus]

The treasure wagering system makes the treasure available after the first person in the arena is killed. This does not make sense when you have a 1 v. 2 battle or even just a free-for-all battle. Since multiple people can slip into the teleporter system for the arena on each side, you can have a three, four or more person battle in one arena match.
Reproduced on invidious (1.71.dev-r20478) when Zett tried to have Grue and myself (SilverNexus1) fight him in the arena. When I defeated Grue (accidentally, since we were trying to fight Zett), the arena acted as though a victor had been determined, giving the victory message and opening the wagered treasure area, although there was still Zett and me in the arena fighting.

There are two ways I can think of to remedy this: either tweak the setup so that it makes it only 1 v. 1 (and not allow players to tailgate through the gate system), or tweak the setup so it allows for free-for-alls and teams in the arena. I personally think the latter is a better long-term answer, but one that takes more effort to accomplish. Looking for some feedback as to which way this should be resolved, though.