I have tried a few variants as well:
All decent tests used AH>Masonry>Wheel>Agr>Pottery>Writing (but only the first 3 matter for the test, the rest are really only so we have a basis for comparison)
1) WB>worker>GW
WB first, maxing food until pop 2 then switch to 2 grass hills. When WB finished start worker (GH & pigs for 1t, then fish & pigs). When worker out start Great Wall (fish & GH) until pigs are finished. Max hammers at pop 5, starve with a few turns left.
Start settler at 2120BC so same as Joe.
63 beakers in Writing
5 food in storage
23 hammers into Settler
2) Worker>part WB>GW
Max food, switch to GW as soon as we learn Masonry, max hammers
Start WB again in 2080
3) Best outcome I had
WB first, maxing food until pop 2 then switch to 2 grass hills. When WB finished start worker. When worker out start Great Wall (max food) until pigs are finished. Max hammers at pop 5, starve with a few turns left.
71 beakers in Writing
6 food in storage
21 hammers into Settler