Just a quick vote for Deceive being useful in many situations.
Since it almost always hits, it's a great backup for when you've drawn some unwanted aggro. It's very satisfying to see that BadGuy running straight for you with Slicing on his mind, turn tail and run the other direction after a quick Deceive.
I also like to Deceive Surgeons and Medics and have them healing me/and team for a while until they get knocked out.
R