Archaelicos
Warlord
That's an interesting idea, I may have to try it. Is there any other pre-req for Feudalism?
I go for Culture Victories, so my top three may be a bit bias.
1. Stonehenge (Quick culture)
2. Sistine Chapel (Additional culture to specialists)
3. Oracle (Free Tech. for getting another religion)
GW just really helps me concentrate on early expansion since Barbs won't bother me. I realize its a short term benefit, but there is something satisfying about a horde of Barbs spawning by my city and attacking my neighbors instead.
The Stonehenge culture is de minimus with respect to a cultural victory and not worth bothering with.
The only purpose of Stonehenge is to get your city borders to expand faster in the early game, without having to waste time and resources on building Monuments. However, my take is that this puts you behind in building a more needed Worker, Settler, or Warrior.
Finally, the Statue of Zeus only really benefits you when you are at war.
It only figures for 4000 soldiers - same as one longbow (ref The inner workings of the Demo screen explained).
There are many things that don't figure in Power Rating, making AI war decision based on incomplete information at the best.