Some details from my sub 200T game.
Firstly I had three incoming RAs in last turns but I didn't know if it will be enough and waited for last natural born scientist four turns with prebuild Hubble (it turned out unnecessary) and without it I easy could finished at 195T. (I was a little bit too cautious)
The key to winning was milking abounding in gold friendly AIs
I had four waves of loans from AIs (approx. 90,120,150,180) from which I bought science buildings and RAs, and spaceships parts from last one.
I chose Freedom what with friendly AIs is definitely good choice (also it 'free' your
production in last turns so you can build science , international games. etc.)
I built only four cities, before, seeing how easy five city exceeds 5% penalty I thought it is good to build it, however it also makes problems with happiness, national wonders etc, so now I'm not sure what is really better.
Some dates:
49 T religion (thanks to desert folklore)
54 2 cities NC
82 education
130 scientific theory
134 radio (Oxford, freedom)
157 plastic
Social policies: full tradition, , rationalism, commerce to mercantilism, freedom
Even though the goal of this thread has been achieved there is still much room for improvement (eg. if I better gather religion I could easy got 3GS and 1GE instead of 2GS and 1GE) and sub 190T is very possible.
OK now I can rest in peace
(means play some GOTMs, etc, maybe try Beyond Earth but possible imbalance on release scares me)