it's seem that there is no secret number to make the stats max permanently.
i set the CA 190 and PA 200, then i set the ability to 20(max) and it works for me!!!
but the stats wil go down when the players go down on holiday at the end of the season or when he caught an injury for more than one week.
you must set the professionalism and workrate of your player to max, so he will train more seriously in order to increase his ability faster and keep it not to going down.
you also needed to increase of the coach ability to max in order to make the training session become more efective.
I set the training session of the player (basic on his position) into very hard. example Pazzini got intensive on shooting, hing on ball control, physic, and attacking and medium on tactic. Don't worry, the player will not getting tired eassily. Or you can set the natural fittnes to max to avoid the player get tired eassily.
it works for Luca Toni, Pazzini, Ronaldinho, montolivo, Cardenas, Messi, Mascherano, Rafinha, arcelo(fluminese), Puyol, Raul Albiol, and Ustari. So, the age of the player is not too important.
It's also work for young player like jack hobbs(liverpool), Nicolas Millan(colo-colo), Bojan(barcelona). the stats increase more faster.
hope it's help...
im using the FM Modifier by the way.
sorry if my english is bad...
he...he...he...
But i think it's okay, cuzzz...
Football is UNIVERSAL LANGUAGE!!!!!
GRANDE VIOLA
GRANDE VIOLA