I think you guys should go for an 80% pangea with England for the spaceship launch. Why? It sounds like just enough of a challenge. You don't need any "real" wars to launch. I did a 5cc standard-sized map spaceship game with Persia and only had one battle to launch my GA... an immortal vs. an American spear (they got conquered the very next turn). I think I had aggressiveness at maximum, but I don't recall and forgot to note it. http://forums.civfanatics.com/showthread.php?t=283144&page=2
If you do play pangea on Demi-God, seriously consider the Great Library. Maybe it slows things down at this level (sounds more like an advantage to me on Demi-God)... and surely people get by without it... but when I haven't built it, early on I usually have a poor economy from Demi-God on up. Once it turns off, outpacing and/or keeping up with the AIs comes as much more economically feasible (especially a bit after the AIs have Banking). So, I'd say go inf on Writing then sup on either Philosophy or Literature. Oh... I mean min on Writing and max on Philosophy or Literature. Trade for Masonry if you want a good sized pre-build or just build The Great Library without it, almost surely in your first ring if not in your capital. Maybe add in some workers to that city for more production when building The Great Library.
If you do play pangea on Demi-God, seriously consider the Great Library. Maybe it slows things down at this level (sounds more like an advantage to me on Demi-God)... and surely people get by without it... but when I haven't built it, early on I usually have a poor economy from Demi-God on up. Once it turns off, outpacing and/or keeping up with the AIs comes as much more economically feasible (especially a bit after the AIs have Banking). So, I'd say go inf on Writing then sup on either Philosophy or Literature. Oh... I mean min on Writing and max on Philosophy or Literature. Trade for Masonry if you want a good sized pre-build or just build The Great Library without it, almost surely in your first ring if not in your capital. Maybe add in some workers to that city for more production when building The Great Library.

But everyone meets everyone quick so it acts like a Pangea.
). You have to use all "the Big Picture" tricks in the book: make all scientists temporarily into taxmen in the F1 screen to boost your available gpt, hold back optional techs from the gifting process, first gift up weaklings that need your lux and strat resources the most, yada yada yada. Tons of fun! Not to brag...too much
since I'm sure others have done the same thing... but in a recent solo Deity game, I was able to secure 7 Modern Age techs in one turn from this process with the help of a nicely timed ToE build. It was like a geek cocaine rush. 