Is that in one vehicle? Driver, backup driver, two gunners. That would be ideal. Even better if those roles can shift as needed. It might be worth having a fifth as a healer/medic if they are self sufficient enough to not be a liability. Anyone who can't double down on roles will probably necessitate an additional fighter as protection, and then we'll be split between at least two vehicles. More difficult to defend, and potentially more difficult to stay together.

[Not that you asked her. Don't mind Natasha, this is just similar enough to running ops back home to be almost comfortingly familiar.]