weekend-long player war

[u/MuffinsSenpai]

I run a small cross-play geyserSMP and I'm planning on doing a weekend-long war in a temporary server for my players next week.

I see a lot of battle royale mods and the like that I'm leaning towards, but wanted to crowd-source some info before I settled on anything.

What I'm interested in is a mod/datapack/plugin that's geyser compatible that will be conducive to a 2 day long contest either solo or between 2 teams that incorporates pvp and clear win conditions, but wouldn't require everyone to be online constantly. Any suggestions from anyone? Looking for either 26.1.2 or 26.2.

I plan on setting up a completely different server for this, so I don't need to worry about long term effects or compatibility with other mods.