Eagle Warrior (Aztec) - 43
Hetairoi (Macedon/Alexander) – 31
Legion (Rome) – 24 (27 - 3): The Legion is great, but we're getting down to the big dogs here, and it's simply the weakest left here. It's got really high combat strength for the era (pair that with a promotion and it can actually contest knights to a degree), but it overall lacks the utility that other units here have. The Mamluks, Eagle Warriors, Pítati Archers, and War Carts are simply better and more impactful, straight up. The Hetairoi are more comparable, but considering the extra mobility, free promotion, Great General synergy, and the fact they upgrade into knights, I'd have to give them the edge. Sorry Legions: you guys are great, just not top five great.
Mamluk (Arabia) - 39
Pítati Archer (Nubia) - 48 (47 + 1): Simply put, it's the best unique unit in the game. I've already stated why I feel that way once before in this thread, but it's stupidly strong, it's fast, it's cheap, earn experience more quickly, and it's an archer replacement, which are fantastic units in general. I know those last three points are not necessarily reflective of the unique properties of the Pítati, and more so of archers/Nubia in general; but context is important when talking about uniques, and the context that the Pítati finds itself in makes it all the better.
War Cart (Sumerian) - 46