Your PF, as you say, needs more JS! But also your youg guards!
Why don't you give for the three of them Jump Shot training? Of course you would have to play you PF in a guard position but you could easily do it on the scrimage!
Other option would be train 1 x 1 for forwards that trains JS, IS, HD and DR. You could play your guards as SF and your PF as PF and they would improve in the secundaries really fast (specially Driving) and have some pops on JS and IS.
The last option, and this would be my favourite, is making 1x1 for forwards and JS training. And you could even try to choose beneficial weeks (with less strong oponents) for the train that could cost you more wins!
But is just an opinion ;)