Question:
how much MP do you need to take out the emplacment against a same lvl brit?
under 400mp?? about 600? about 800?
the strat in this game is: invest less MP than your opponent...and you will have a much easier win.
if you build a 400mp unit which the bleed the enemy more than 410mp...its a little win for you ...
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.