Ow. I too focused on just 2 stats at the same time until my 5th season. Always left kicking at 6. Since you get a lot of match xp to gain speed and balance stats in the early years, i didn't focus on them much. In my fifth season this is how i've distributed it. kicking - 3, dribbling - 3, balance -2, Stamina -0, Speed -1, Power - 3.