Luckily the bad Dalembert usually also has foul trouble so his minutes often sort themselves out.
That's really the key, isn't it? As long as Sam is playing within himself, defending, rebounding, blocking shots and getting put-backs and open lay-ups, he's a valuable contributor. There's enough scoring around him that he doesn't hurt the offensive output. If he gets into foul trouble or simply gets tired, we have alternatives in Theo and Mareese.
I would say the more minutes he can play the better. As much as I want Speghts to play, he can concentrate on doing all the things they hope he can. Lou and Andre implied that he could be a great player, and I think he's one of the best big man prospects I have seen in quite some time. I may be out of line with this, but I'd rather have him at this point than Oden.
The more Sam plays the better trade bait he becomes. And the longer he plays the more he can protect the others from foul trouble. One thing about Mareese is that he does seem to pick up fouls and he needs to learn what he can get away with and what he can't.
I also think that ultimately, it depends on how well Sam plays with Elton. It seems to be a good match, a defensive Center and a slightly undersized Power Forward. If they can teach him to play a complimentary role to Brand, that would be ideal. If not, we go to plan B.