Most of my victories end up as conquests so I'm a fan of the Aztecs & the Germans.
Aztecs because they get a free heal after combat victory, which is massive all through the game but especially when you're taking out barbarians early on.
Germans because getting automatic Upgrades to Elite units is invaluable if you're constantly warring.
I was playing Saturday, was way behind in tech but had enough units to keep my cities well defended, Chinese declared war, swarmed over my borders with knights (I only had horsemen and pikemen to defend), built some spies to defend my fortification bonuses and basically turtled, hitting out with the cavalry when safe, about 5 turns later I had 4 or 5 elite horsemen armies, and elite pikemen in every city I was actively defending. Next turn I discovered feudalism, all my elite horsemen got upgraded to knights, so I started wiping out all attacking forces before they could get over my border, then I got gunpowder so all my pikemen got upgraded. Then I got a great leader person that meant I could build elite units straight out of my capital, so by the time I got to Combustion I had a ready made game winning army. Proceeded to trounce the rest of the world.
Aztecs because they get a free heal after combat victory, which is massive all through the game but especially when you're taking out barbarians early on.
Germans because getting automatic Upgrades to Elite units is invaluable if you're constantly warring.
I was playing Saturday, was way behind in tech but had enough units to keep my cities well defended, Chinese declared war, swarmed over my borders with knights (I only had horsemen and pikemen to defend), built some spies to defend my fortification bonuses and basically turtled, hitting out with the cavalry when safe, about 5 turns later I had 4 or 5 elite horsemen armies, and elite pikemen in every city I was actively defending. Next turn I discovered feudalism, all my elite horsemen got upgraded to knights, so I started wiping out all attacking forces before they could get over my border, then I got gunpowder so all my pikemen got upgraded. Then I got a great leader person that meant I could build elite units straight out of my capital, so by the time I got to Combustion I had a ready made game winning army. Proceeded to trounce the rest of the world.