I think I found a pretty serious bug with the exile victory condition. If you look at the screenshot below, you can see there is one planet that says the exile planet is 6 hops away. Problem is that I did not send a single combat unit there. The only unit that made it there was a scout that died instantly. The other exile location data there, I managed to get through destroying the AI command station. I thought I was gonna need a hack or something to pinpoint the exile location.