What if your opponent:
1. "Cleverly" sweeps your mines,
2. is not a total scrub / avoids your Pzfausts and
3. uses his light vehicles on your flanks?
#theorycraftingFTW
1. He can try sweeping mines all day long, but he's gonna have to crawl across overlapping MG fire first. An obstacle which is not covered by weapons is not an obstacle.
2. If he isn't within PzFaust range, then he's not close enough to circle strafe my AT gun effectively.
3. Then I turn around and get the shot off half a second later to more or less the same effect, especially since I have mines there too. Only mining the approach all your guns are facing would be stupid.
It's not theorycrafting, it's the shit I do every match.
The best thing an Allied player can do against OH is encirclement. You let him have his patch of land and outproduce him before he gets the tech to start trading armor effectively, shut him down early. You can't let him rest in a point of strategic superiority, or you'll never kick him out of it.