I played the game couple of times and I must say it is very very tough. Steve as you said the game is experimental I wanted to write my whole experience of the game which I played twice.. Just to let you know I can easily defeat emperor level (in PTW)..
Attempts:
1) Settling at the given settlers: If u settle where the settlers are given you won't have any luxuries --> no gold --> won't be able catch up with AI's in Tech race..and soon will be one whole age behind them..
Moreover the barbs will come from two many places to defend. Also the production in cities is also not that great with the top city with not much shields/food...Also won't be able to communicate with any civ other than egypt for a long time as the barbs will kill your curragh too..
Ohhh and that Choke point you won't be able to hold it as Egypt will make a city there and ask you to move them away.
Ok nevertheless I continue in a hope something good might come up later on after I have Republic and cash flowing in and get the two luxuries south of the map..But because of the distribution of AI's on Continents is such that 4-3-1..the 2 Ai's at war will be crushed by the 3rd one on their Island..Egypt and India....So actually the war is not an added benefit. Moreover as it is continents even if we create a war b/w India and Egypt it won't do any good..
End Result : One age behind and India win Space race..I was surprised y Egypt didn't win Cultural Victory though they had 100k pts. I asked the question here and someone told that it needs to be DBL of the one second in cultural race..is it right ??
2) Change the starting location: As I had previous game knowledge I settled near the Luxuries. This time luckily the war b/w the AI helps and Celts clears rome and was comparable to Egypt on my island..On the other Island Babylonians destroyed the pers but was miniature compared to India..
Game was going good and not much problem of barbs too as they had only one direction to come from..the gold was also flowing in..
I also got ahead in technology till the INdustrial age and was now aiming for space race victory but India wins Cultural Victory

(..
Egypt was way larger than India as they destroyed celts so I expected them to have atleast half the culture of India !! Is this half culture rule correct ?
I am sorry that I have written ahead of Ancient ages but the game seems to be really hard to win as there is nothing you can do about India who is on a different island and will either get a cultural victory / space race unless either babylonians/pers become the same size as India....
Can you change some thing in the game so that we have some chance...
The war helps in the way that with the losing civ you can exchange tech in the Middle ages..but it makes one civ (the one which is not fighting any war) very very large..
If this was Pangaea instead then I think it would have been easier..or let us try with no fix wars also..the choke point not of much use unless you waste a settler there..
I will try a third time with a different strategy let's see how it goes..If someone can clear the cultural victory(that the winning AI need to have twice the culture of the 2nd one) rule than I think I can do a space race / Diplomatic victory