As ost, 480 to Counter pit 100% of the time.
As OKW 270 in addition to regular army(or however much puppchen costs).
Also, there is also area denial you forgot.
ost:
you must
a) such a great player that you build 2 ost mortars and kill a brit emplacment at 100% without losing a single model...every time
b) a lier.
okw:
what do you mean regular army? what did cost this regular army and how high are to cost of manpower did you need to kill a well defenced emplacment? 0 MP? 100mp?? 300mp?? ..?