Nice!
So...eldorado or not?
Thanks.

Nope, no El Dorado. It appears relatively often on Lakes I think, but I didn't get it this time. Anyway, here's the detailed writeup.
I used the following settings: 5 billion world age, temperate, arid, small bodies of water. Promotion saving on.
The start:
This is a very nice 3-pop city spot. Good production is crucial - Attila's bonus to pastures synergizes with early war so well. Settling on a mining lux is great too - steal an AI worker early, sell the lux in a peace deal for quick 240 gold. The other silver allows to do this twice - so this is about as good as finding El Dorado really.
The plan was simple - send 2-3 pairs of Battering rams in different directions early, demand tribute from CS, snipe capitals. Then spam Horse Archers for support.
Tech order: Bronze Working - Wheel - lux techs
BO: Warriors, Battering Rams, Horse Archers
Policies: Liberty opener - Free worker - Golden age - Happiness
T25, scouting:
Here I was about to get my second ram and had to decide which way to go first. Lakes always has pretty much the same layout as Great Plains, 4 civs spread out evenly in the north and 4 civs in the south. I chose to send the first two rams to Marrakech, then continue the northern conquest into either Brazil or Arabia. I didn't scout Brazil's capital and Mecca looked super easy to take, so I visited Harun first. The second pair of rams would move to Vienna and other southern civs.
T33, Marrakech falls.
T44, Vienna.
T47, Mecca
By t48 I got another pair of rams and sent them to the east, to kill either Pedro or whatever AI was south of him. Then I finally scout Brazil's capital:
2 rams is obviously not good enough for that, so I leave Pedro alone for now. It becomes clear he'll be the final target and I'll just need to zerg him with a ton of units. I send the 2 rams south of Brazil and find Venice there. The Horse Archer spam begins, slightly sped up by Liberty's Golden Age.
T57 Lisbon falls, but I lose a ram. Maria retook the city 2 or 3 times, but then I got a peace deal on t62.
T60, Addis Ababa. Haile also managed to retake the city a couple of times. We make peace on t65 or so.
T62, Venice. Meanwhile, I'm moving troops to Brazil's capital
T68, Pedro's doomed.