I like having 16 units and would never dream of having less, if the opponent has less then its even better because very few units no matter what morale rout when hit in back by extra unit :D

also i think the best anti-cav in game are horse archers, they can flank and shoot enemy cav/inf and run outa way when chased- if cav do chase them they get tired out + horse archers rnt terrible in combat so flanking with them ot using them vs light cav works just fine