Puck is NOT a good mount. He's too stubborn.
Cicero, you might build an assassin character in Ahnatep where the Eypharian nobles still play such games in their crumbling city. Or something like that might work in Sunberth. They're lawless anarchists... well, I guess "might makes right" is their law. You might check that city out too.
If your initial idea doesn't pan out exactly the way you hoped, they might at least be places to start with a modified idea.