I hope they will be good in III too

For real, I use the 15/12 as SG but it's a great idea use the best scorer against not-the-best defender. Is this?
I can imagine that one more level in JR is better but I don't know if, and probably this is my real question, another level of JR is too much in other tactics like Motion or Princeton or Outside Isolation.
So I can save 7-8k and build them up in others skills like driving.