In AvP I think the spear went through the queen's crest or something.
But in my opinion,
A shot to the face (not crest) = instant death
To the neck = instant death via decapitation
To the chest or waist = incapacitation, queen possible blown in half, easily finished off by second shot in any case
To the leg = leg and mobility are gone
To the arm or fancy headcrest = she's gonna keep coming