Well One on One will train Handling and Driving and is quick to train. And also provides training for JS and IS.
Training Handling doesn't train as many important skills in my opinion.
Passing would be nice to have, but I think it would take much longer than Jump Shot to train up, and Jump Shot is already at inept so not as hard to get up to Strong or higher. Where as passing would take a very long time.
Different people have different opinions on shot blocking. I think it is important, but it inflates salary a lot, so in your case I wouldn't train it.