I think you have answered your own question really. If you were to ask anyone what the important attributes for a striker in CM0102 are the usual reply would be 'finishing, jumping, off the ball, pace and acceleration" but you have noticed a correlation between the freaks having a high value for one on ones (intrinsically). To answer your question, run two tests - one with 20 for one on ones and one with 1 for one on ones.