If at some point Keltham ends up busy on contract work again, and they don't want to just take that time off, the class might consider a collective project to probe variations on what Keltham tried, among the four departed Ostensos or the local support personnel, to see if they can hone some version of that - maybe not involving books about magic, it might have to be something more common - into a form that reliably produces incoherent preferences in Golarionites.
Then they get to be like little tiny Keepers relative to the rest of Golarion, having refined for themselves a piece of knowledge that they can use to make other people's brains produce financial errors! Further exercise, come up with your own list of ethical restrictions about how this very very very mildly terrifying knowledge should be used by Project students.