Out of the guys we have to work with? He's probably the option that makes the most sense. Also for what it's worth, which isn't very much given the sample size, Simmons has done his best working hitting 2nd (.322/.354/.444 (.799) in 97 PA). The reason I believe that is the case is because Simmons can hit anyone's fastball and hitting in that spot of the order you get more fastballs to hit.