Wai Lin doesn't even need a crossbow. She's got the power of Asia.
You can't shoot a guard on a mountaintop lair from a basket hundreds of feet away with the power of Asia. Maybe if you had some of those awesome Crouching Tiger weapons.
Did anymore make a list of movies where a group sets out to rescue a person or a small group, only to lose far more people than the ones being rescued in the process? That always amuses me.