I've been exploring several different strategies for this gauntlet.
I have been having trouble getting to Gunpowder fast enough peacefully (either via plunders or The Oracle poisoning the Great Scientist gene pool too much) with enough hammer potential to generate sufficient Oromo Warriors to start capturing AI cities before too many AIs get to Feudalism (Longbowman). After this the AI starts getting other key military technologies like Machinery (Crossbowman), Engineering (3 plot movement via roads; Castles vs Catapult/Trebuchet bombardment), Civil Service (Maceman), and Guilds (Knights). Oromo Warrior Drill III/Drill IV have a really tough time versus Knights, so the military campaign needs to be well under way before Knights appear and one needs Pikemen (Engineering) to keep Knights from attacking Oromo Warrior stacks.
All but one of my attempts started with Oracling Theology. Only one attempt was foiled by an unusually eary AI Oracle completion on turn 45. Two of my attempts skipped Bronze Working and still got the Oracle on turn 59 well after Writing and Monotheism were completed, so Oracling Civil Service seems possible though it may require the 1st GS bulb Mathematics prior to completing Code of Laws.
One of my strategies, beelines Literature after oracling Theology for The Great Library and National Epic. That is quite similar to
Snatty's article "BTS – A guide for higher difficulties for standard speed and maps (emperor+)":
http://forums.civfanatics.com/showthread.php?t=248435
It differs in the beginning, where I oracle Theology, before beelining Literature. I also never research Archery, whereas his article recommends Archery after failing to find either Horse or Copper. Another difference is I assume No Barbarians whereas he assumes at least normal Barbarians.
I'm also considering beelines to Gunpowder, hoping to get there well before the AI gets to Feudalism, providing plenty of time to build 20 or more Oromo Warriors by the time the first AI gets to Feudalism. Stacks would include Catapults and/or Trebuchets which can do an optimal 1 turn partial bombard and a few barrages to chip away at the defenders, so the relatively more expensive Oromo Warriors will rarely face odds less than 90 percent. This beeline would research Paper (2/3 of a GS bulb = significant waste) and double bulb Education and research Gunpowder. It would avoid bulbing Philosophy and ignore the Liberalism race.
Another strategy I've been considering is either Oracling Code of Laws or even Civil Service and then beelining Literature for The Great Library and National Epic. GS bulb Philosophy ASAP, adopt Pacifism, bulb/research Paper, double bulb Education, avoid Machinery and bulb Liberalism taking Nationalism, build The Taj Mahal and research Gunpowder.
Finally, I'll give Snatty's strategy a chance too. I had a great game going, but got unlucky genes: GP, GP, GA, GS, GS, GS, GS. First two GS bulbed Education and last two bulbed Chemistry to allow access to a Steel for Canons. I got the GA with 5% odds! One Great Prophet at 25% odds is not unexpected, but two in a row at 25% is a little more remote (or should be). I used the first Great Prophet for a Golden Age. Second Great Prophet was used to construct The Church of the Nativity which immedaitely brought in 15 Wpt. I build a Missionary for Mansa Musa and he spread it to all his cities. With income from this shrine and a couple of ~10 Wpt resource trades and occasionally techology trade for some Wealth, I was able to keep research at 100% from completing Paper/starting Gunpowder through completing Steel. BTW, I foolishly completed Gunpowder before Liberalism, because none of tbe AI had Paper. However, Darius I acquired Paper and finished Education and Liberalism 2t before I could finish Liberalism building Research too in 7t. I suspect that Darius I may have single bulbed Education or just deficit researched Education/Liberalism at 100%. In the end, I was boxed in by the the four high technology AI leaders, including Mehmed II who was already fielding Cavalry and had over 40 units in a border city earlier for a while (including 10 Cuirassiers). The other four Civs would have been easy Cannon fodder, but they were too far away.
Right now, I'm trying some Worker stealing and beelining Animal Husbandry, if Horse is near, research Horseback Riding. Otherwise research Bronze Working -> Iron Working until Copper or Iron is found. I got to the Iron site literally just in time; Darius I was 1 plot away, but apparently didn't have Iron Working, since he didn't settle on or ajacent to the Iron.
shulec may have the right idea about taking out a few (3-6) AI leaders early with Horse Archers. Even Axemen or Swordsmen could take out maybe 2-4 AI leaders, especially with later Chariots (distant Horse) to pillage strategic resources. This approach may work best with Horse in the BFC or capital Ring 3 (culture by turn 25-26).
Sun Tzu Wu