The fun part is in BG3 you get a helmet that sets your int to 18 from anywhere right at the beginning. So, you could roll a really dumb wizard here, assuming you can get him to that point in the story.
Really? I've not found that helmet yet. If it exists I could increase Con a lot more and dump Int.
OH, it comes from
that clever Ogre, but I've been keeping him as an ally but never actually used the warhorn yet.