Speed kills at younger ages and closer distances. As they get older, only unicorns of speed can get away without location. I voted location and thats what my DD struggles with.
Its called "FastPitch" for a reason. So speed would be the first choice, however not the strongest choice. Location would be the strongest of the three options. Movement or AKA Spin will become one. Once you mastered a drop or curve, your location will be on point.
So fire, earth, wind, water, and heart will form Captain Planet or a good softball player.....