George, "I don't expect to see Amare, KT, and Boris in the lineup at the same time very often."
Probably not unless Amare has developed a lethal 3pt shot from the corner, then you could essentially play him like you would TT - an oversized SF.
With Amre at high post, KT would be on the baseline. With Boris at high post, Amare would be at the baseline which is where he played for the first two years he was on the team.
Regardless of who is on the floor why would you want anyone on the baseline, other than in the corner? We want to keep the floor spread as much as possible and all the opponents bigs pulled away from the hoop. Of course, KT may drop down for the purpose of setting a pick but in general we want to run a lay up drill for our cutters and drivers so keep him in a high post position (elbow) for them to slice and curl off of - and to keep his man as far from the basket as possible.
Pulling the bigs out has a domino effect on the defense - if they're not able to help much the wing defenders will have more responsibility to provide help which means they have to pay attention to whats happening with the ball so they are more susceptible to back door cuts by our wings and, of course, they'll be pulled off them more giving more open 3s.
If the opponents put a defender on Amare that he can score on with relative ease in the low post, then he posts low until he's driven the fellow off the floor - the same thing with Boris or TT.
I'm still intrigued by the idea of having Boris do a two man game with Amare and Boris with TT in the corner.
One of the key things about the classic two man game exemplified by Stockton and Malone was that if the defenders switched there were two size mismatches that favored Utah. Generally speaking, Boris and Amare would not have that factor working for them. Of course, if, say Boris' defender couldn't cope at all with Amare in the low post then in that case there would be an advantage to be gained. Against that, it takes lots of practice to perfect the two man game and I'd think it would be better for Nash and Amare or Nash and Boris to use it because it would be effective much more frequently. Why didn't Nash and Amare use it? Probably because Nash and D'Antoni are more familiar with the pick & roll, which accomplishes about the same ends.
Of course, I'm not sure what you mean by a two man game. What I mean is the man with the ball is stationary and his teammate sets up in pick position - threatening a P&R/Pop. Since the guy with the ball is stationary the pick setter can jockey for position and as the defenders adjust the offensive guys read it and they both feint movements. The critical thing is that they have to be in close synch because the openings are usually small and there is a very real threat of being called for a moving pick.
