[Imp]

Roman heavy tank makes little diffrence AFAIK do alawys play with it off as AI seems to buy better that way. All it does in last few passes is make the AI favour buying armour over its other choices so you might get a few extra tanks instead of it using those points on something else. And I do mean a few will make little diffrence to total no of tanks but seems in my view to give a more piecemeal setup than tank heavy off.