It's simple. Just play a melee-focused wizard. Wade into battle with your quarterstaff and teach those monsters a thing or two. Don't be some kind of wuss retreating for healing all the time either. When you drop to negatives, that's the game telling you it's okay to quit.
I predict your problem of a wizard with a 6 intelligence will be "solved" in short order.
I predict your problem of a wizard with a 6 intelligence will be "solved" in short order.