These are powerful. They are correct on paper. But they lie to you.
The Tyranny of Choice: Why the "Best" Starting Class in Pathfinder: Kingmaker Isn't What You Think pathfinder kingmaker best starting class
Let me explain. Most guides will tell you the meta: Sylvan Sorcerer (for the pet that tanks while you learn the rules), Vivisectionist (for sneak attack damage that trivializes act 1), or Monk (Scaled Fist) into Paladin for unholy touch AC. These are powerful