I wanna post a short chronicle of my 2nd (and better) attempt.
My capital was on the coast (but only 3 or 4 tiles of sea) with 2 gems (1 has a jungle grew on turn 5), 2 clams and rice.
My close neighbors were Stalin and Cathy.
No horses too close, and 2 copper, 1 settled by Cathy 5 turns before my first settler was ready, and 1 in the 2nd cultural border of S.Pete (Stalin's capital).
Thanks to the creative trait i managed to hook this one, settling my 2nd city 1 tile from it.
With a good ol' axe-rush i eliminated (quickly?... 775-475 BC) Stalin, and horses were hooked too.
Then Cathy, a bit longer (distance), but axes, spears (she has chariots) and finally keshiks did the job 295BC-65AD.
I produced only military in all my cities, then i couldn't be faster.
So, in 65AD, i settled 1 city (and my capital), captured 3 from Stalin and 5 from Cathy (1 razed, rubbish), founded Confu, first on alpha and good tradings. My core was russian.
In the west i has Vicky, at the time 3rd in score, so i DoW her in 155AD.
Easily conquered the first city (jews Holy), the turn my troops were arrived to the 2nd, archers became LONGBOWS, about 230AD.
So i has to wait for my first cats arriving, and finally eliminated Vicky in 545AD, fighting against Elephants, cats and LBs (luckily i has ivory, too).
Then some turn of resting, some courthouses and more units.
725 AD: Asoka, in the middle of the half-ring that was the shape of my empire.
Not a problem with 4 poorly defended (archers) and close cities, but when i arrived to siege his last one he vassalized (845) to Roosevelt (north of former England). Eliminated in 890AD, but i has to face the american stacks (3rd world power - Kublai-Bismark-Roosevelt).
Once eliminated the invaders with almost no losses, i captured Boston (with colossus) and suddenly Roosevelt vassalized to Bismark (1040).
I was first in tech, despite my rate was @50% and my army was large, powerful and well promoted.
Last but not least, WW was NOT a problem, they declared, not me (i think this is the good side of the thing).
Captured Washington i concentrated on Bismark, with his collection of wonders.
Captured 1 german city, Berlin under siege, NYC razed and Roos "renounced to the protection" and capitulated to me, giving all he has.
German cities fell like blades of grass before my knights, elephants, trebs and maces, after the 4rth one Biz vassalized to Qin (1262). He was my next target, beeing almost the center of the circle, so again thanks... WW will never be a problem.
Luckily no problems from West (JC, HC, WK, Ramesses and Gengis) and Gandhi (far NE) was a good trading partner.
Invaders wiped, Germany was close to nothing, just the time to heal and bring more to the front (front? heavily promoted stacks from north, fresh troops from south) and... first to liberalism (thanks a GS for edu), got Nationalism, then MT and GP... and a GE for Taj wow, a GA when cavalry was arriving, and the great generals for war academies.
After Beijing and 2 or 3 chinese cities captured (1 razed) Biz "renounced to the protection" and capitulated to me, giving all he has (1388).
2 cities in the same turn and Qin capitulated in 1394 (almost nothing to give).
Rest? NO ... only a handful of % away from 51.
1400 AD persian war: first city captured in the same turn (borders wasn't expanded), eliminated in 1472 (the time to arrive, he was in a peninsula north of Karakorum, east side of the circle).
Some turns for borders expansion, domination in 1496.
Sincerely, i can't see how to improve, if in 300AD you find elephants and longbows, as i already said, keshiks can go to pasture sheeps.
My tech path was optimal for a warmonger game, after alpha i researched literature instead of math, but i managed to trade for it, and literature was a good trading tech (not to mention HE with marble), so construction wasn't delayed, then the path to engineering (first on it).
Not a single wonder built, but Taj with a GE and Versailles in a German city in the end-game.
Just 6 turns of pause after the early russians wars and 10 after the english was necessary to heal units, build and moving more, so i think it's a need (comments welcome).
The first axe rush: 2 axes for 1 archer, more if on a hill ... takes forever.
About vassal states: dunno if it's a pain or a chance.
In this game Asoka under Roos, Roos under Biz, Biz under Qin, then A>B>C>D.
The only problem was Roos, the others was a gift.