Mentalist
Source: I Made It the Fuck Up
Your study into people's behaviors and mannerisms makes them as transparent as glass to you, and easy to manipulate.
When you cast a spell that charms or frightens the target and requires a saving throw, you may change the type of saving throw required to be Intelligence instead.
In addition, as an action you may cast Detect Thoughts on a creature that is charmed or frightened by you. The duration of this spell is changed to 1 round instead of its normal duration, it does not require concentration, and you may change the type of saving throw required to probe deeper into the creature’s mind to be Intelligence rather than Wisdom.