In 1130, I finish all my Universities and start on Oxford in London. I also switch to Rep,Caste, and Org Religion.
I am able to trade for Phil.,Guilds and Engineering and after PP, I start on Banking, then Liberalism. I finish Liberalism first, and get replacable parts, and start on rifling.
I finish rifling in 1325 and switch to theocracy/vassalage/police start and start producing Redcoats (thanks for hint about Drill IV Redcoats, btw). I'm going for Economics for the free GM, although now that I write that, I should have made a push towards steel instead.
In 1380, I take the Redcoats, with some Musketmen and Catapults and attack Sumeria. Now is when it all goes wrong. First of all, the Catapults were not very helpful. 7 of them and I bombarded the capital city, and yet by the next turn it was as if nothing had happened. Second, in 1390, the Vickings declare war on me, and enters my territory with a pretty big stack. I am able to hold him off, but much of my force which I had hoped to send towards Sumeria ends up being diverted to defeat Ragnar's stack. I finally suicide all the catapults and use the Redcoat/Musketmen to raze Uruk in 1415, and then make peace (I think I get whatever gold Gilgamesh has left). I am able to then finish off Ragnar's stack.
I go back to producing Redcoats, although this time I also start on some Trebs to come with me. I manage to get Mansa to declare on Ragnar, and then shortly after Ragnar agrees to peace with me. Poor Mansa then gets attacked by Catherine. He asks to be my Vassal, but I have no interest in war with Catherine, so I decline, and a few turns later Catherine asks me to declare on Mansa, which I do to keep her happy. It's all for nothing on my part, though, because as I go back after Sumeria, Gilgamesh vassals to Catherine, and we end up at war anyway. It's not as bad as I thought it would be, though, and I am able to conquer or raze most of Sumeria (he's left with a single city on the other side of the continent). It takes too long for some cities to get pacified, though, and I end up giving one of the captured cities to Pericles. I sign a peace treaty with Russians/Malis/Sumarians in 1560AD.
I now switched to Rep/Bureau/Free Religion and though I would focus on my science. Here are some shots, and I will also attached my current saved game (BUG 4.3).