Can you use the electric gates to contain both the players and land based bosses? Do you control where on the boss map the bosses spawn?
I was imagining a gate locking in the players where they spawn so they cant abuse the contained bosses, and also surrounding the bosses with the same gate so they cant attack the players while frozen.
Put the switch in the cage where the players spawn.
Sorry if that doesnt make sense, drunk and reading through this interesting thread :3