Lately, Shaka. I play with Blake's AI, and Shaka has developed a penchant for the early SoD approach. In the last 3 games of mine that he has been in:
1) Monarch (nearest neighbor) - wiped me out after attacking me with 2 stacks of 6 archers
2) Monarch (nearest neighbor) - he was on a peninsula with me between him and everyone else; he tried the Archer SoD approach again. I sent them packing but he kept sending more. I took two cities but he refused to accept peace. I quit the game after we both had Ironworking and iron was revealed under his capitol (I had pillaged his copper, but couldn't maintain the troops to ever take his capitol). We were so far behind the other 13 AI in techs and cities that there was no point.
3) Prince (current game) - Shaka, Brennus, Monty, Ragnar and I (Churchill) all start on an hourglass shaped continent. I am in the lower left, Shaka in the upper right, Monty's in the middle. My nearest neighbor is Ragnar and there is a 6 tile belt of Jungle below Monty and above Ragnar and I. In the space of 10 turns (Marathon), I see that Brennus has died (I hadn't met him yet, but Shaka took him out); Monty founds Judaism; Shaka declares war on Monty. 10 turns after that Monty joins Brennus in the discard pile. I take out Ragnar. Shaka and I become best friends as the only remaining hebrew nations on the planet. Shaka is comfortably atop the scoreboard, leading in cities, land and tech.
I had to wait until Grenadiers and Cannon to turn on him: I switched to Buddhism (the dominant religion elsewhere), captured the Hebrew shrine (complete with Grocer, Market, and Stock Exchange!) and knocked him off the leader board. I took 5 cities, 3 of which were size 16+, and he still comes in a close 2nd in land and population.
Of course, the biggest shock of all came two turns after I switched to Buddhism: Isabella (the Buddhist founder) declares war on me from the far side of the world and lands 3 Conquistador's next to Nidaros! They apparently hadn't gotten word of my conversion
