I faced a PTRS blobber once so far with OKW.
I used about 4 volks with a FHQ and a leIG (worked well vs the blob). I made the mistake of getting an MG34, which ended up quickly getting blown to bits. After that I got T4 up pretty fast and I got 2x Obers with LMG34s. I did not spend ammo on schreks until he got tanks (no need to get them earlier). After that I just saved up for King Tiger and rolled him with that. Those silly rifles ain't got shit against the king tiger.
The most important lesson I learned from that game was that Green Cover is super important, even for OKW, and that the Obers Booby Traps are pretty nice.
This sounds like the BO I thought would work, but tht mixed with soviet T4 makes kt and LeIG not that effective. The bombs tht has makes me to careful with the kt, any damage on the engine means trouble.