The more I think about Saurfang’s attempted snark over Rastakhan, the less sense it makes.
He was captured during the Siege of Lordaeron. Well before the Horde PC’s asventures in Wakandalar. He’s never set foot in Zandalar in his life. He’s had no chance to form any kind of attachment to Rastakhan. And minimal chance to form any with Talanji, assuming they even had the chance to chat in prison.