Boo,
real war is entirely different from this cartoon game. I mean, even a poor stick has hundreds of hours flying and fighting. In the war, the majority were extremely unexperienced (in our standards), so a german pilot who had like 20-50-100-150 kills, was like an unbeatable monster, due to his relatively amazing routine. So thats why i can imagine a real top pilot (Barkhorn, Nowi, Krupinski, Rall, Marseille, Galland or Moelders) succesfully engage more than three-four opponents at once.