You said rogues in your experience dump Wisdom. I don't think it is "daring" to say that it is sub-optimal for the skill-monkey class to dump the ability score for the most commonly-used skill in the game.Claiming the optimal design of Rogues is to pump WIS so they can scout seems like a very daring take on what "optimal" is. It's certainly a design that you can do - whether it's an "optimal" one is another question and one that depends on your party and how they operate.
You don't have to pump Wisdom; a moderate investment, plus an Expertise slot, is plenty. Forget scouting, it will pay for itself in averted ambushes alone.