The randomness of the result far outweighs any logical planning for tactics and training. I feel from my match experiences that ID is much more effective blocking IS than OD is at blocking JS.
Well, the simple answer is that I don't believe the theory is right.
If you are in a league without good perimeter defenders, then after a certain point training outside shooting will have diminishing returns. But then, this is true for every type of skill at some point, right?
If you go by the salary formula, the most important offensive skill for a SG should be JR.