Since time and Polman will both be out up front here's what I think.
Ed needs to move over to wing and let Chris Brady move to center, leaving Alex and Brady as the centers to double shift for Tim. Brady has been wanting to move over to center anyway which is more what he's used to playing.
If those two get winded, Ed can slide back over to wing.
I also think this gives Ed more of a chance to use his speed to generate offensively.