Just to show you our military might, here's one of our four stacks of doom.
inherited turn:
I fire a golden age and declare war on cyrus/alex, not seeing any reason to delay that. We immediately get 4 WW in all cities, but that's ok. We've got plenty of happiness. I don't move any units into enemy territory yet, as some of them are healing, but most importantly I want to lure Cyrus' SOD into our lands, so that I can kill it without any WW.
turn 1:
And it worked like a charm. At the cost of a single worker as a bait, we have lured Persian army into a trap
Needless to say his army was anihillated. It was so numerous I had to attack with nearby Axemen as well

Meanwhile I sent our 2nd stack towards Cyrus' closest city
Our 3rd stack towards Alex's lands
I'm not sure if Cyrus can Vassalize to us while he has his own Vassal, so I'm gonna concentrate on killing Alex first.
One mini-stack to clean up Greek southern cities:
The rest of our troops are healing at the moment.
btw here's powergraph:
turn 3:
Assembly line is in. So is war weariness.
After razing 2 Persian cities WW jumped from 4 to 13.
I go for Facism to be able to build Mt. Rushmore (due in 4)
Police State might not be good, because we're getting a LOT of beakers from representation. I think increasing slider is better here.
Good news: Alex has renounced protection of Cyrus and is now a free state.
turn 4:
Alex capitulates:
I also present him with this great deal. He was more than happy to oblige:
Presented this wonderful opportunity to GIlgamesh as well and he also gladly agreed.
That helped our happiness porblem a little bit.
Cyrus offers 330 gold for peace.
Umm... no I don't think so.
I start sending units towards Khan and Wang in case Persian lands won't be enough to win
turn 8:
Cyrus still not willing to Capitulate. I declare war on GK and Wang to give our units something to do while our main sod is marching through Cyrus' lands.
turn 15:
Err Cyrus would capitulate now but he is "afraid of your enemies".
Maybe declaring on Khan was not such a great move
We could take peace with Khan and then Vassalize Cyrus but I'm not sure if that'd be enough to win domination. We can also just start destroying Khan, until Cyrus is no longer afraid of him, but WW is a real problem now. Railroad is due in 3, after that we can just shut down research and switch to police state I guess.
Few notes:
-We've got about 60 rifles 60 Infantry and 60 cannon.
-It's micromanagement nightmare right now.
-I left our workers on automated, I hope it's all right.
-Some of our units might be on go-to, I tried not to allow that to happen but there's just too many of them to be sure.
-We're crushing every AI from every direction, that's the biggest mop up I've ever seen
I played 15 turns thinking that I can end it, but I didn't manage to, so it's now up to Shyuhe.