Reasoning:

76ers - They may not resign grimes so why not get something in return. 1 FRP and dalton should be decent enough value. Dalton would be a cheap replacement who could be decent for them if given the chance.

Nets - Get off of manns contract to clear cap space and get a pick

Lakers - Grimes has played with Luka and is an ideal player for LA who can defend and score of the bench. Mann is a typical 3&D guard that can help the bench or starting lineup