Selecting Mongolia, flipping Turkic and Chinese cities, whose armies are exiled back to their own territories. That is, a huge stack of crossbows and firelancers sitting at Samarkand or Beijing. And what I have are just little 6 Keshiks and some other troops, even unable to push into the first city if dice is rolled badly.
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, and making heavy usage of both whipping and purchasing new units to help further your conquests. Also, you have the Mongolian special ability to cripple defenses, as well as the Keshik, who deals collateral damage. You might have to sacrifice a few Keshik, but really the best case scenario is that the majority of the enemy military is stationed on one tile. That way you can wipe them all out in one blow.