I played out my 16 ballista game last night - I had a unit of feudal sargents, unit of vanilla spear, unit of hobilars and a unit of jinettes. The infantry sat back while the cavalry went round the flank of the serried ranks of ballistas who all decided to run away when flanked. The game lasted about 2 minutes! I did manage to loose about 4 men - 2 or 3 infantry, presumably to some ballista bolts and 1 cavalry man, who I assume must have fallen off his horse laughing.