The best picks outside of lane to counter 刀锋舞者 include 死亡颂唱者, 复仇之矛, and 皮城女警. These champions are all great at countering 刀锋舞者 with win rates over 56%. Even if these 刀锋舞者 counter picks are not chosen opposite your position, it's not a good idea to choose her into these matchups. They will usually beat 刀锋舞者.
Conversely, if the opposite team picks either 曙光女神 or 水晶先锋, 刀锋舞者 mains should strongly consider picking her, as she easily beats these champions with win rates over 55% against each ofthem.