The unit with the best price-to-performance ratio.

Avern, I got the information from there. Indeed, the Ancient Behemoth costs not 2, but 3 thousand. But it's still very cheap.
Added after 12 minutes
http://photofile.ru/users/max_2008-2008/150110041/?mode=xlarge Here is a table with the results of 1 on 1 battles. It is clearly visible that the strongest are the Ancient Behemoth and the Archangel. The information was obtained using a combat emulator.