I tried to negotiate a peace with the Egyptians as the Ponts in my RTR campaign. I had landed a assault near Alexandria and mopped up the Ptolemaic Empire without engaging the Seluecids, but once I got the Egyptians down to three provinces I couldn't get them to take a protectorate or peace (with me giving them 30k and 4 of their old provinces). They wanted everything back, including their islands, so I am at the moment pillaging their last cities.