"More like two-on-two. A wing of six pegasi is really three pairs working closely together. One member of the pair selects a target and initiates the attack. Their wingpony watches their tail, defending them from anypony else, and keeps an eye on the general situation. The judges will pay the most attention to the leading pony's attack, but they'll be watching to see how well the trailing pony defends them, and how well the leader reacts to any attackers that get through the cover. Conversely, if you go in on a pony who's already being attacked by others, you can get penalized for dishonorable fighting, even if you take them down. Unless it's your own team beating them up, of course. You're allowed to gang up that way."