Idea
I don't know how it work...9 prisons would be lot and since there aren't many players...wait...how about team prisons? For there would be 1 prison in each base.
Example how the prisons will work:
If blue team kills any enemy, they will be respawned into 'blue' prison. This means that red, green and gold team members can be in that prison at the same time. There are 3 doors. Red, green and gold. Now for example, green team touches the blue padlock icon, the green door in the prison opens and the green team can walk out of it. If other teams try to do the same, they will be killed or counted as llama.
The scoring system:
If one team is completly prisoned, other teams would get 1 point. So the team, who is locked down first, will not get any points. Team who is imprisoned second, will get 1 point during the round. Third captured team will get 2 ponts and the winning team of the round will get 3 points.
If the team is captured while other teams are still free and kicking, they would not be executed immediately. If 3 teams are captured, you would see all prisons with prisoners inside them and how they will be executed (the winning team would be teleported out during the execution process).
Arena fights: They will activate, if at least one member of 2 teams are in prison. But if players in 3 or 4 teams are in prison, too, then the arena fight takes place with 1 player with each team. The winner in arena match will be freed but the rest of players will respawn back in prison again.
There would be option which allows to do arena fights with completly locked down team members so they have some kind of hope.
So how do you like it? (sorry for bad grammar)