Not. Depends on your opponents, ally and their skills. My allies generally go either ranged or air so I typically get footmen with defend (in 2v2 you NEED footmen with defend cuz there always is lots of ranged, melee isn't too effective in bigger battles cuz they keep on getting in each others way), riflemen and casters. If my ally goes ranged I'll go footies, casters and air. And get a tower or maybe even two when your ally is noobish, else you die in their rush (speaking from human point of view)