Finding a start position with salt and mountains is very OP.
The key to this game is to have a lot of neighbors. You send caravans to your neighbors, hoping to become friends, so they start sending caravans to you as well. I had a lot of caravans to and from Babylon and Morocco, and later with the dutch, india and siam. After education most of my caravans are used for food, but it is always nice to send one caravan to Morocco for gold.
To achieve the caravan success, My capital build order is scout, scout, settler, caravan. The settler builds a city where new trade routes is possible. I go for NC before building more cities, and try to settle 2 more right after NC (preferably one settler from money and one from the second city)
My research order is mining, animals, pottery -> philosophy -> theology (to get a nice religion with hagia sophia and Borobudur) -> Education -> Astro
(Sailing and Iron working is usually a good choice after philo)
My policies are full tradition, than patronage until renaissance, so you get the science from every allied city state policy, I also got the +20 starting influence policy. So it is basically a very peaceful strategy, where you want to be friends with all AI and allied to all city states.
I had a lot of RA:s, I try to use 3 waves of RA:s. One the get scientific ~turn 130, one tog get plastics ~turn 160, and one to finish the game before turn 200. Before the second wave you want both the wonder and the policy for better RA:s. I use rationalism finisher for radio and then RA:s time well with plastics. I believe I had 4, 5 and 6 RA:s.
The ideology of choice is freedom. I purchased all Space parts.
The tricky thing with this strategy is to avoid war. The plan is to have a lot of neighbors, so one of them often wants to take your cities, despite long friendly relationships. Hopefully you have some military units from city states and are well ahead of your opponent in tech. Bribes when you see big armies at the border is often a good idea. I got lucky and wasn't DoWed until I was 2 turns away from getting the "free units" ideology.