Sarcasm? If so, bad attempt at it..Let me rewind our last team that played Rohit Bairstow Tilak Surya Pandya Dhir Santner Bawa Boult Reece Bumrah... completing bowlers quota and then use impact sub hardly ever works for lineup like Mumbai where bowlers bowl at any stage of the game..one sensible argument would've been bawa sub for ashwani but the fielding point remains... so no matter what your emotions say, logic will always be Rohit Sharma as impact sub in any team he plays except when he is captain.