Let me rephrase what I said in light of the recent forum meta here:
You don’t need to have a high value for any particular stat at all. You can get through the game just fine with a unique play through at that. BUT it would be nice to have a diverse ability spread across your party, that is, not having EVERYONE based around 1-2 attributes. For example, I wouldn’t want to miss out on perception checks because I refused to put anyone’s points into Wisdom. Fundamentally, however, you can get through the game fine with whatever composition you want, even 4 fighters with maxed out STR and CON while dumping WIS and CHA.
