If you see it like this, you need every player with every skill. I saw in a LI a Bigman shooting a 3pt... Everything happened in this game but it is a question if you really need JR on bigman while playing LI, or you better concentrate on other skills. I will never say: "hmmm i dont buy this guard, he has to low SB"... And to train SB or ID when I play 3-2 Zone is another criterium. I think its more efficent when you focus on more important skills like OD or JS on guards and ID/SB on Center...
Europameister S42