What would your ideal U21 player look like at each position (at the start of their age 21 season), obviously it's different for each offence but try to list a reliable starting five. Let's say the guards are drafted at 6/6/6/6/6/6 4/4/4/4, the bigs at 4/4/4/4/4/4 6/6/6/6, and the SF starts with straight 5s.
Ok, finally, what everyone has been waiting for.
I did find this hard, and I'm not sure I really like what I came up with. The above starting skills aren't ideal for what I'd want but are an excellent device to see what you can do, and the totals are about average for what an U21 player should start with.
PG: 8/8/12/12/12/12 6/7/4/4
SG: 11/9/12/11/11/8 6/7/4/4
SF: 9/7/10/10/11/6 7/9/5/8
PF: 7/5/6/9/10/6 10/11/7/10
C : 6/4/5/8/9/5 9/12/11/11
Tbh, those players wouldn't necessarily be starters. And at SF, for the U21s you're much more likely to want a guard there who has some ID, or a PF with some OD, as its difficult to make a decent SF at 21.
If anyone wants to come up with different players and really you should, I don't like mine that much, then if you do add skills somewhere you would have to say what skill you'd not train in order to increase the one you want.