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?