MI should retain, Rohit Sharma, Jasprit Bumrah and Hardik Pandya. They Should try to Buy Ben Stokes in Auction and if fails to buy then should use RTM for Pollard.
Pollard is wonderful Player for them but now only 2 Dimensional with hardly being used as Bowler and Batting is occasionally brilliant but mostly not reliable and Ben Stokes would be better replacement option.
If not pollard RTM should be used to retain McClenaghan and Krunal Pandya as both are brilliant for there success in last IPL Win.
Other Player they would be interested in Mayank Agarwal, Shreyas Iyer, Jayedev Unadkat, Karn Sharma, Nitish Rana, Parthiv Shaw, among others.
Some Foreign Players to look out for are Chris Lynn, Chris Morris, Glen Maxwell, if not retained by their respective Franchisees......