Last attempt for me: 1765 AD, I hope it will be accepted...
This was a weird game; 4 good cities, about 2 others including first captured with moderate tank production. Only 4 with religion. First game where I bought some stuff in the beginning and never switched away from Merc.-might have been important. Furthermore I rushed capital factory quite early and build some 3xp tanks, GE came very late.
Egypt war went well, but I nearly quit when I needed 4 full turns on Gandhi's first city, my 2nd victim. Some 10 tanks sacrificed there. Funny enough, Gandhi offered vassalage with 3/5 cities left, so not too much wasted there. His culture and railroads became quite important during the last two wars...
Hatshi built an early Apollo, and Wang Kong very early Manhattan. Fortunately, Louis was the only one with Uranium, and never managed to research or trade Rocketry
(His 6 tanks were annoying though.)
My tactics for this gauntlet are practically the same as Lexad's.
In addition, I'd say that while vassalizing the first 2-3 is okay, the last 3 enemies must fall in a total of 6 turns. Second front (on 3rd victim) should be established while 2nd war is still continuing. From there work your way in both directions until you meet again for the last one.
It's a pity I play so slowly (7 hours this last game), as I think with a bit more luck and a little better start 1755 would be possible.
P.S.: Never built IW, never built Academy (until last turn
). 2 Generals become Medic3, 2nd GE builds West Point. 3rd GG & GE come too late and practically have no effect.