The twins' fight against the deer could only be described as unfair. And even though the twins were lower in level compared to the deer, the ones who felt that it was unfair were in fact, the two deer instead of the twins.
Without even exchanging a single word from each other, only by seeing the other's body language and knowing each other's personality so well that they could correctly guess what move the other would be doing next, the twins moved perfectly in sync with each other, supported, and covered each other's gaps be it either in defense or attack.