Yeah OD and ID are the "first step" about defense. Without them... you see Lakers defense?

I don't want kill ID but I like to find a good compromise between ID and SB.
In fact my thought started after the decision to try the shot (OD+ID+Stamina have already worked), in particular a shot in the paint, and after that the opponent flow, contrasted by my OD, carry the ball into shooter's hands. This one doesn't pass the ball and believe that he has good chances to make 2 points. Here comes SB. Maybe SB is counted into the Inside Defense Ratings but it's another story.
As you say, if ID is high that shot (if taken) will be guarded or it will be a very difficult shot to do. If ID is not enought we'll see an open shot. SB is more useful with guarded shot because to block an open shot we need someone like Dhalsim!
With an X level of ID (helped by OD + Stamina) my defender allows 15 attempt for example and taking the Nachtmahr's data he will block or alter (same results=no points) 2/3 of the attempts. For 5 times the opponent will make point and/or will go to the line.
With the same opponent's IS and the same defender's SB but with less ID (helped by the same OD + Stamina) we'll see more attempts. I swear, I talk only 1 level less. Maybe my defender will fight against not 15 but 18 (21?) FGA. And he will blocks/alters always 2/3 of them: now the opponent will find the rim 6 (7?) times.
What I say is that 2 more levels of SB probably will work better and block/alter that 1 (2?) other shot(s).
Why this suicide?
Because the opponent team will give more attempt to that man (as I say above a sort of iso) taking away the same number of attempts from other guys. And I do this because my defender, that has more SB, know what he has to do. Like a trap!