I actualy in my campaing i use then all. :P
I mean normaly i have the classical hoplitais in the center and front, along with 1 or 2 phalangitais. And protecting their sides, i use torakitai, turophoroi, and those Iphikratous Hoplitai and his heavier form asweal. for flanking troops normaly i use local troops,and fast inf, like peltastoi sometimes and those light hoplitai. My slingers are always in front of my cav on the sides. Normaly i dont have more than 2 kind of troops in a army. So it is always pretty ballanced.