I have to agree with the original poster im always tuetons because they have the best infantry in the game

But i saughta like persians because they have the best cavalry in the game

Best land unit is the monk if you upgrade it enough. They are long range, they heal each other, they convert mass armies if you know how to do it right, and combine them with Halberdiers just incase of a huge horse army coming, and monks are pretty unstoppable.