team chief's argument -
Alright, so Revan and Jake are dead, it's a four on four. For starters, Duke kicking Master Chief is going to do next to nothing to him. Augmented super soldier, super reinforced bones, his forcefield (kick bypasses his helmet, but says nothing about the field). Kefka is dancing for 30 seconds, at which point he's naked...which doesn't mean much of anything, given he wasn't dressed in anything but a robe to start with and didn't have any equipment. Dancing's probably about over by the time the teams meet, or close to it. KOS-MOS is immediately abandoning her team to go fetch the cheese in the middle of Neutral, which is conveniently covered up in a bunch of cardboard boxes, so she's gonna be stuck for awhile. M47 missile from Big Boss probably takes care of her, since she was never the most durable thing on two feet. If the M47 can smash up a Metal Gear, it can smash up KOS-MOS, who got taken down by Shion carrying a pistol, of all things.
Speaking of mindless, Fou Lu is berserk, so he too is gonna be charging forward...right into the field of boxes. Big Boss's assortment of cardboard boxes include such lovely things as boxes that have frag grenades in them, boxes that have stun grenades in them, and boxes that have smoke grenades in them, all of which go off when they're disturbed. Fou Lu is going to be blown to bits as he mindlessly runs after my squad, and if he isn't finished off, he's in no proper frame of mind to deal with two far smarter and invisible guys in BB and Joanna, plus Master Chief, who can range whore him to death all day.
So with two of the other team not thinking properly and Leeroy Jenkinsing themselves, it leaves Duke and Bryan, both of which also have that nasty 'Traversing a box minefield' problem, and who are badly outclassed by my range guys anyway. Duke is human, and has no particular defense vs Joanna's drug based weaponry (Crossbow, Knives and N-Bombs all revolve around messing over your perception. Tranquilizer is just a flat 'She's injected you with an overdose of knockout drugs. You are now dead'), Bryan is nothing Big Boss hasn't already beaten in Volgin. And he did that with far inferior weaponry to what he has here.
TLDR, Fou-Lu and KOS-MOS are not in their right frames of mind and open to being picked apart by more clear headed people as they respectively berserker charge and hunt for cheese in an endless pile of boxes, Duke's kick ain't fazing Master Chief enough to matter, and Chief/Big Boss/Joanna are flat better than Duke and Fury. Soon as Kefka stops dancing, it turns into a stomp.