MGs, arty, mines, demo charges, mortars, kiting?
So the answer to an easy to wield blob of AT DEATH is to create a micro intensive wall of men that will just get stukad anyway?
SU halftrack can be OK but the micro is very hard to manage while simultaneously retreating men as as needed.
The only sure fire way I have found to routinely handle okw blobs is to go sov industry and rotate 2 kv8 between repairing and engaging. Most OKW blobbers get a hard on when they see a kv8 and think they can kill it but it takes a lot of hits to force it to retreat. Meanwhile you've killed half their men. However it definitely needs the support of a su76 /su85 to discourage panthers from chasing it down after it retreats.