[Basic] What skills for a long con or ...

[Pursuivant]

Originally Posted by Polydamas

I can understand the wish to distinguish mechanically between someone with Fast-Talk, Acting, and Leadership who has never gulled a mark, and a veteran scammer. I am not sure how (although a Perk might not be bad, and there are familiarities).

Possibly Techniques, since Fast-Talk, Acting, etc. cover a lot of ground.

Originally Posted by Polydamas

How does GURPS handle stage magic? That is another field where practice is knowing the principles of a few dozen basic tricks and being able to present them confidently and make them feel new.

Sleight-of-Hand is the basic skill for tricks which require you to palm or plant small objects. Performance skill helps you put on a good show and Fast-Talk is handy if you are actively trying to misdirect attention. The sort of stage magic which involves illusions or rigged props rather than Sleight-of-Hand could be treated as a Professional Skill (Stage Magician).