I agree that 2 skilled knights and one skilled builder can do a LOT but not in that situation. If you seen the pictures ( here is it Spoiler: Spoiler Hint just in case you haven't seen it). You can see that the spike are Right in front of the blue main base. It would've been impossible to cover one builder from falling bombs from the top and knights slashing at you when you cant jump. And there weren't a few people it was the whole blue team. Which made it even harder. Can you agree with me?