Dwight doesn't like physical play. Collins will be valuable to come in and hammer him for 15-20 minutes, lean on him, hard foul him, etc. That's all we need from Collins.
Then let Wilcox and KG run the crap out of him.
As for Bynum, he also does not like physical play - Collins can do the same to him for 15-20 minutes.
One concern I have with the Lakers now though is that MWP and Dwight will certainly cause a lot of havoc in the front court from a physical standpoint. That will free up Gasol, Nash and Kobe...