Genghis Khan is the final boss army of the Golden Horde Campaign.
Unit Type - Archer: Basic Ranged Infantry. Gambit - Wild Volley: Attack enemies in a row (top to bottom from players perspective).
Genghis Khan has a unique gambit for the mid-game as King Arthur or Charlemagne players. Only Caesar players get this gambit attack through their prestige heroes (Gnaeus Agricola). For that reason he's an interesting hero for non-Caesar players, however you then factor in his lack of unit bonus and the 2 favorites, Alfred and Attila, draw you away.
Overall a decent hero with a decent mid-game gambit attack. Just need's a little boost and he'd be a favorite for mid-game gambit users.