People relax when they feel superior. If you look too sharp, you trigger defenses, rivalry, and unnecessary tests.
Let vanity do your work. Appear harmless. Ask for clarification. Allow them to overexplain. They reveal details, commitments, and weaknesses because they believe they control the room. They grow careless while you stay observant.
Do not mock them openly. The trap fails when they feel it. The best disguise is low threat, not elaborate acting. Underestimation is a door.
When they think you are naive, they speak more freely. That speech becomes information, and information becomes leverage. You do not need to dominate immediately. You need to know more than they think you know. Then you can move with precision, while they remain confident and blind. Confidence is often the weakness.