Basically, I stole him a worker and then I tried to choke Genghis with warriors and chariots. I couldn't kill many archers due to the jungle but could regularly disconnect his resources (I lost 4 chariots in the field and have 4 others).
Meanwhile, city 2 by the wheat focused on building the GLH and completed it on 1160 BC. City 3 went inland by the horse + plains hills to help with the expansion. Barb cities spawned far east and I settled agressively the southern coast, towards Pacal. I'll probably move the capital in Hastings since London isn't coastal and Hasting is a killer city (fish, copper, pigs, rice, grassland).
The techpath went something like : Agriculture, AH, The Wheel, Sailing, Masonry, Bronze Working, Writing (late Writing !), HBR, Alphabet.
Maybe I should've gone Alphabet before HBR, I don't know. Pottery, Archery and IW are much needed.
I'm not sure what tech I'm going for, next. Maybe Metal Casting, even though Pacal already has it. Knights and Banks are appealing. Getting Monotheism soon would also help. So maybe I'l research a cheaper tech to trade, like Aesthetics. Trading Aesthetics to Pacal/Asoka can't be a bad thing.
I'm still settling cities and lacking workers badly so I don't know at what rate I'll produce HAs. Not sure either of what units I'll go with against Pacal...
Among good things,
Cyrus has planted a city on our landmass and it will make a prime espionnage target.
Genghis has built the Great Wall and the Pyramids.
Pacal is spreading buddhism to us (but no other AI, yet) and has shrined his city.
View of the Empire :
Genghis :