I think Mahinmi wiill get numerous opportunities.
Elson (along with Duncan at the basket) has already proven to be quite effective guarding Dirk. The strategy has only been used over a game once, and the other time it was still effective, but a lot shorter (for some minutes). Obviously being saved for a potential playoff meeting. That's part of why Elson's on this team, because of his quickness and length on both ends of the court. He'll be back in the rotation (in some form) soon, came back from injury a week ago, and Pop's been getting Horry more time. Along with going small a number of times. Plus Oberto getting his usual time. Elson was playing pretty well before he got hurt.
But I think Mahinmi would favor to be a factor defensively against quicker PFs in the future.