Since now you have bought a fast training AML, I will advice you to train him Free Kick and invest in him until he is 7 star with very high white attributes.
Use him for everything, from taking Free Kick to taking corner to taking penalties. He will be your master of all trade, your go to man.
Because of his high attacking attribute he will excel in everything and will serve your club for man seasons.
I bought him at Level 1 and invested in him. Since then he has never disappointed me.
I personally like Free Kick and Shadow Striker SA. Special ablities are tempting and good to have but they are not that helpful.