Let me first say that I have no experience at the NT/B3 level, so I'm just going on theory and experience that others shared, so it could very well be that things I suggest don't work as I think, but I just want to answer your request to make a SB-team and add to the discussion :)
I believe there are teams that have that high DR/HA/PA, but is there data/experience to show what the increase from the levels I suggested to those high levels have for impact in games? I would think that at a certain point, even higher doesn't have a very big impact anymore on bigs, just because they handle the ball less. Again, something needs to be sacrificed to keep things comparable to the team you presented in order to add SB. There have been indications that adding SB is effective, the question is wether the gains in much higher SB are higher than the loss of a little RB, ID, HA/DR/PA. I think the little drops in these skills are not as impactful as the 10 extra SB. I'm curious to see how others think they can add SB in the same limits (TSP, salary, potential), maybe other sacrifices are better than the ones I'm suggesting. For example, I added JR too, but that can be reduced again for the HA/DR/PA, which might be better when you stick with LI. I added JR in the assumption I would suggest another type of attack too, but then decided I would stick to LI and stay close to the builds you used.