from what I've read, happiness is a lot easier to come by, due to mercantile CS and all the new luxuries.
I didn't have time to play again since the last post. If happiness is more aboundant, this can certify that a Tradition approach is probably a nice way to go(Liberty can be interesting too, but it's just nice that Tradition can compete that tree again
) due to large amount of happiness available, like it was before the june 2011 patch for the vanilla game.
Well in my very first try i went Liberty first and tried to copy paste a bit what i was able to do from vanila but it seems that only the worker first approach can be interesting at least for a monument/granary approach followed by a wonder. I failed at going for 4 cities in a record time.
But Traditon opens something interesting...the amount of gold can be raised in some ways(locking tiles while building a settler etc.) and the possibility of growing faster later and with free monuments make 2nd and 3rd city great candidates to pump up warriors. With a lot of spare money it's now possible to rush buy 1 or 2 workers pretty fast.
Anyway this is only the beginning of a long and rigorous analysis
I only played at quick speed yet(mainyl for mp analysis) but it's largely possible to chunk our 4th city aorund turn 34-35 in time for iron working.
Prelude approach :
Research AH-Pottery. Start with scout-worker-faith building(pottery in time). Grow to 4
Then 3 settlers going for iron working. Settle on a lux with one city(preferably a mine). Maybe researching another lux tech before IW too? Not sure yet. The faith building let you choose a religion soon enough, giving you another boost(like the +1 production for pop 3 cities).
Probably going for Metal Casting after other lux techs and Philo and build workshops in early huge cities for maximum output.
The average way to get NC in mp games is around turn 63. I was very close from that date when i tried a Tradition approach(with an army of 6 swords of course
)