Pontos: Chersonesos Advisor Script?

Playing as Pontos in EB 1.2, my advisor has alerted me to a nomadic attack on my ally Chersonesos. I have followed his directions and brought a general and some soliders to Crimea, and I have received the advisor Polemon and found the Chersonese exiles near the city. I can't seem to make any progress with Rhaskos and these exiles though. I've tried bribing them with my general nearby, with no luck. How should I proceed? What exactly is meant to be the progression of this script?

I bribed them with Polemon for about 1000 mnai if I remember right. I'm not sure if that is what is meant to happen though.