I'm creating a rage skill for a barbarian character, it's a passive that should give strength points, but I don't know how many strength points it would be balanced to do, I'm using the game's standard skills as a reference, how much strength each level of this skill should give 4 or maybe 5? I am aware that many factors can influence this so I chose as a base a melee hero with a main attribute of strength and base attack speed similar to the paladin.