Skills for Corners and Free Kicks?

[iSusel]

Hello, fellow trainers!
I'm trying to figure out if there is a dependence on how the kickers perform on some particular skills.

I have my top attacker AMR with FK and SS abilities, he is set to all free kicks and penalties:


And I also have a DR that I gave a CK ability and try to boost his Crossing. He is assigned to all corners:


_Logically_ (which may do little with the engine), the perfect corners kicker should have high crossing, passing (?), may be creativity (??)...

And for the free kicks it should be good to have shooting and finishing... I guess.

Is there any theory about how it works in reality?