It's not a perfect solution, as it wasn't purpose built for craftmine, but DANGERFullServerKill should have a similar effect to this. I may consider updating it to be properly purpose built for this use case though. (I'd imagine if someone respawned after dying this would break functionality, as someone would be considered alive)

Heya, reviewing the code and how craftmine multiplayer works again, I reckon this is already handled. It may not work so well if someone late joins/joins in the middle of the mine. And I may still try to make a fix for that case.

But if you go into the config and enable DANGERFullServerKill, and you don't have the hunter config set to true, it'll kill instead of incapacitated when no one is able to revive themselves or each other.

This also checks the inventories of players to look for items they can revive themselves with before killing, and if present in an inventory the kills won't go through to allow the user to revive themselves.