Power Buildings

You are right. But there is one drawback: by the time the Ogres arrive, they will already be gone, and the Cyclops is the only ranged unit in the army (besides the hero).

What about Centaurs? Their skills say they are "ranged." And it's not a big deal that they don't shoot well. At least they don't need cover and are also suitable for defense, so they can shoot from towers.