haa same, usually i use them on my left with thraiken light calv /prodimo and my hetairoi/lonchrophia at the right flank with my FM or general.
left attack there flank or calv while my hetairoi and loncho will strike at there calv/fm then roll up the lin and smash theM!!!

hetairoi to break formation and kill then loncho right after to break again and kill but also go in melee (they have an aspis and kopis!!!) and rest my hetaroi then rinse and repeat up the line !!=insta win