I just want to mention that it's possible to go beyond 80K with a better map. My map was just an average, domination limit of 4411 with just 1 source of luxury on the starting island and only 1 cow at the starting location. Although I was blessed with a huge island, resource was extremly rare (exactly the reason why the AIs didn't want my land) and have to wait until Navigation trade for the third source of luxury. I had a lot of horsemen but no iron for knight upgrade. I didn't get my own iron until around 800AD (IIRC). Therefore, I would imagine my 81K won't stay at the first slot very long. Nevertheless, I'm quite please with my final score - it's a good score to retire with.
