Normally I feel, if the formation with AMx, the MC will play as a ball-transfer station: get ball from Dx, pass to forwarding attacker, pass to winger...easy to tire and low efficiency. the only mc i have with better performance has the SA shadow shooter (MC/AMC double position), he scores in far distance. not so much feelings on other SA..
I guess 4-1-3-2 could spur the MC, maybe more chances to assists, even this game assist judgement weird...