Yeah, this is gonna be tough. Mc said he wasn't skilled with knife fighting in the last chapter and said the twins were athletic in this one. As much as MC is a survival junkie that doesn't train your body as much as an athlete unless you consistently do your jungle training regularly. But then again he could scale a tree easily so maybe he might have a shot at taking them down?
Unfortunately although he has a knife, he's pretty much outnumbered and has 4 extra girls he needs to protect. Best situation for him is to set up traps in advance of an attack because although he may have an advantage in a 1v1, I think he's screwed if the other camp attacks all at once.