If you apply them automaticly they Will be distributed in equal parts, the player Will keep the same diference between the defense, atack and phy and mental.

Nobody knows the correct way to do it, and If Nordeus knows it, they just dont whant to tell us.

Physical and mental is a important part, that should not be forgotten, it must be balanced with the atack If the player play in atacking positions or with defense If the players play in defensive positions.

But this all depends in the way you play.
For exemple If you play pressing all pitch, If your strikers dont have good defensive skills, they Will not gaine many balls, playing that way they Will only lose condition.