I went for Gandhi first with cuirs, but things where really tough, as he for some reason had built an ungodly amout of pikes. Had to stall attack for quite some time to get some trebs (later cannons) and rifles going too, although I took a few cities every now and then that where badly guarded.
But his capital and the double-shrine city with 60 gpt where out of reach.
When I finally had cannons ready, he had reached rifling, which made things even slower.
I did capitulate him, and turned my attention to Boudica after that, who where teching really really slowly. Took her best cities quickly and capitulated her.
Here I did a horrid mistake which made the game take a wrong turn.
After the speed with Boudica I declared on Hammy quickly and split my stack in two forces, the southern force got hit really badly by Hammys SOD which where equipped with alot of cavallery.
These losses made it impossible to get ceasefires, and impossible to capitulate him. And when I finally got peace (and got a city in the deal) he peace vassaled to Zara.
After that, I couldn't really catch up with Zara and Gilgamesh, both whom where zooming through the tech tree.
When I was at assembly line, that wasn't enough so had to continue toward bombers+tanks, but when I got there that wasn't enough either.
Theoretically, I could probably have gone for nukes then, but it's unlikley that I would have had time to stop them both, and it would have been very laborious.