Sorry but I wouldn't even try to engage Obers with Cons
You can replace obers with Fallschirms, Jaeger Light Infantry, PGs, vet3 LMG grens, g43 fusiliers. They all have the damage output in a single squad to completely decimate a conscript squad due to the insanely long throw animation, even if you ignore the usual runup requirement due to the range.
As for maxim support, to be honest "soviet combined arms" where you have a few maxims and a few more cons is like the easiest possible thing to beat as OKW. Maxim spam is more powerful without a question, but straight up con spam is also more powerful purely because many players seem to have some illogical fear of making more than 3 volks in the early game which means you can potentially push them off the map before the 1/2cp (mg34/fusilier) doctrinal infantry with pure numbers. But realistically if you actually want to win against OKW, you're going with T1 and multiple snipers. Every single game, every single map.