charisma i set to the lowest possible (1 most) because there is no profit exept for interactions with people (and for that i have my asimar cleric with wis20/char20) and skills (diplomacy...) which i also give to my cleric. the other ones dont need it.
i have max con always because hp are important
int is also useless i set it to 3 for fighters.
you can determine if a certain attribute is good for something if you go into the info->attributes(? or was it stats, you know what i mean) and there are the modifiers. if none of them depends you, min it.