Syri bug more or less gives constant intelligence but you can also get it through Semith in Tavros. (Willpower and Physique at same time with Mirrin, aim at pool, reflexes at jogging)
Being blunt you could just add bunch of skill points, play as a Merc and add the "steel wiil" one through save editor, you will get all those points and max stats anyway unless you are doing a 1 inteligence bimbo build, and give yourself a Stormbull Shotgun or Hirudo Devourer to almost practically one shot everything.