First Spoiler
I declared on Julius in 545 AD taking out his iron on the next turn and then his major cities to the east after that. He didn't put up much of a fight as he only had a couple Praetorians and after I took his iron all he coule make was archers. It did take awhile to finish him as the troops had to backtrack to get his southern cities. About half the way through the war with him I started moving new troops into position for taking on Ghandi also. I declared on Ghandi in 1070 AD and finished Julius in 1184 AD.
Ghandi had longbows but those weren't much of a match to my now veteran maces and cats along with Knights. He had a lot of cities and the main thing that slowed me down against him was not having enough units to leave behind in cities. I took all of his main cities and then gave him peace in 1328 for a tech and some gold leaving him with like 4 or 5 western coastal cities. I declared again 10 turns later after getting some longbows in cities to free up maces and knights and quickly finished him in 1442.
My research was still strong but quickly dropping because of all the city maitenance. Some of the key techs during this time were:
695AD - Guilds
1100 AD - Astronomy
1424 AD - Chemistry (from Liberalism)
1532 AD - Steel
1565 AD - Military Tradition
1610 AD - Rifling (last tech I researched)
After getting Chemistry I stopped research for a bit and upgraded all Maces to Grenadiers and Caravels to Frigates. I did the same for cats to cannons and knights to cavalry after getting Steel and MT.
With Ghandi gone and newly upgraded units I immediately started shipping them over toward Fredrick who I picked as my first opponent on the other continent because he had built Versailles in 1370 and he wasn't that well liked by Peter and Khan who I was friends with so I could probably get them involved in the war. With my troops half way across Peter's option of declaring on Fred turned red saying he had too much on his hands already.
I declared on Fred in 1496 AD and took his capital just a few turns later as it had Versailles. Little did I know that it also had the Pyramids, Hagia Sophia, and Chichen Itza. Thanks Fred.
Peter was apparently too busy to agree to declare on Fred for a couple of techs because he was getting ready to declare on Fred all by himself.

He declared in 1520 but didn't do much other than pillage my future lands.

Fred had no answers for my city raider grenadiers (the main advantage to upgrading maces over building grens from scratch) and cannons and was eliminated in 1604.
I quickly bribed Peter into war with Louis in 1610 and then declared on him myself in 1613. Louis was able to launch a surprise attack on one of Fred's old cities taking it from me which I took back the next turn. Louis was more heavily defended with modern defenders who had good promotions but was still a walkover. When Peter managed to take Rheims from Louis I was so proud of him I nearly gifted him a tech or some money.
I shut off research in 1610 after getting rifling to up the culture slider to try and get more land for domination limit. I whipped theaters and other culture buildings in Fred's old lands and continued taking cities from Louis until 1688 when I realized I had enough land and pop and made peace, getting a domination win the next turn.
Result:
Domination win - 1691
Score - 78482
I looked back at some of the stats as I always find the kills and loses an interesting stat in war games. I killed over 200 units (not counting workers or sea units) and lost just 30 (17 of which were suicide cats or cannons).