I think you should next train driving or free three, because you never know when you need a couple of clutch free throws. But this trainee looks good, I have a similar guy who's also 6'4 and perennial allstar and 19 years old whom i'm currently training along with another perennial allstar guy, i can't reemmber if the other guy is 19 or 20, could be 20. But i'd train your 19 year very hard, especially since he's perennial allstar. Also stamina might be good to train as well to train.