I plains cow'ed myself in this game, but I never felt like it really hurt me too much. 3T-Warriors were good and even though the landmass is rather big, I was fine with just warriors. The training seems to be paying off somewhat, I feel a lot more comfortable defending. AGG as a trait has officially moved past IND in my personal rating by the way.
FPs are notoriously tough to fogbust, but I parked my scout here and it really paid off. 2nd city went to the pigs... my only city with really good food, it churned out both GS.
Optics came a bit later for me (375 AD), but I have 25 cottages (soon-to-be towns). Went Monarchy with 5 cities because of good space to cottage.
One thing that comes to mind in your game is: could have pre-built Triremes, to move them down south-west and upgrade to caravels when hitting Optics. Also I settled cities #6 and #7 which need a border pop, so I'll sneak in monuments before Astro obsoletes them. Minor point.
I kind of feel comfortable getting to Optics by now, it's the follow-up I am struggling with. Had some perfectly nice games recently where I completely botched the cannon attack. Last time I went with Maces-Cannons, my SOD was wiped out clean and I had to alt-f4. Might try Rifles here or something...
Also: Have to be really picky with tech trades. Better to trade Steel for Military Science etc later than picking up Drama because "why not".
Don't know how to have a killer-stack in 1100 AD without tanking the economy though.. I don't want to whip any of these cottages, right? Well, hard to get enough units out in time... need training.