Maybe you will understand like this :
I have set for
*Free kick left&right :top attack stat (except the one with corner kick because they always cross instead of trying to score)
- usual they have to be the ST Players !
*Left&right corner kick set the one with Pass+cross better then all others (usual are AMC/L/R or MC ...)
*PENALTY KICKER : i ignore any SA and i chose especial to the one with top attack stats then the next one until i fill out the list !
*Captain : i use the gk but i think the best is to chose the one with top mentality stats !

I hope you will find this helpful !