Great suggestion! I did all this after reading your guide, however I was having the hardest time trying to time it on both controllers at the same time, so what I did was having the 7'6 dude play PG on my controller #1 and let the computer A.I. control him.
Then I would just the PG on controller #2 and shot with him in the spots you suggested.
I would honestly recommend 20min halfs over 15 because this will take along time & can be frustrating because that big ass player just doesnt always line up right for the block on the midget PG.
Also when my team would get the ball back I would just press X button and give the ball right back to give the blocker more chances.
Good post Kingjray!