Location will always be most important.
Speed will be next (obviously there is some minimum speed you need for level) but the more speed you have, the more margin for error you have on missing your spot and still being successful
Spin is important, but still last of the 3.
If you want a great example from baseball, just look at Randy Johnson. he always threw exeptionally hard and he always had devistating spin on his wipe out slider. But he was esentially a little better that a league average pitcher until he turned 29 and figued out how to LOCATE his pitches. He didn't add any speed or spin as he aged up from 28 but he did refine his location and won 5 CY-Young awards in the next 10 years.
Speed will be next (obviously there is some minimum speed you need for level) but the more speed you have, the more margin for error you have on missing your spot and still being successful
Spin is important, but still last of the 3.
If you want a great example from baseball, just look at Randy Johnson. he always threw exeptionally hard and he always had devistating spin on his wipe out slider. But he was esentially a little better that a league average pitcher until he turned 29 and figued out how to LOCATE his pitches. He didn't add any speed or spin as he aged up from 28 but he did refine his location and won 5 CY-Young awards in the next 10 years.