Would love to see a thread like that. I'm tempted to reinstall the game just so I can try some ideas I have out.
I'm seeing it now, 4 conscript start followed by 2 engineers or something... what can go wrong? (ha)
Arguably, for the Soviets the 2 best doctrines for this are anti-tank tactics and Defensive doctrine (obviously) with a possible third place going to urban defence.
Some theory -
The core of killing off tanks that you're presumably going to be facing down is forcing them to over extend so that they become easy meat for your tanks or AT guns. To that end. You don't want a fixed defensive position and if anything you don't even want the AT guns even covering the front line. Arguably you just have your anti-infantry at the front line. (for OKW that's a little hard), we're talking about MGs mainly. They hold up the main assault and shut down the infantry, perhaps at the same time you smack them with indirect fire. The tanks obviously will keep moving forward since nothing bad will be happening to them. In my mind I wouldn't have mines there. You want make it so that when the enemy hits a mine, there's no possible escape. They can't just reverse a few metres and then you become the one attacking.
With the enemy infantry hopefully seperated, you have your AT trap infantry ready, if the enemy hasn't struck a mine by now already. With the tank's engine damaged, its dead meat and you send in your AT guns.
I have a feeling that defense by itself, particularly in this game, is worthless if you don't gain from it. Therefore I'd recommend having a strong reserve. You have lots of AT mines etc already, if those are backed up by some of your forces, the non-manouevre ones, then you can afford to defend. Meanwhile you have your mobile forces, presumably a tank supported by some elite infantry (I'm imagining an armoured reserve of dual T-34-85s would give someone an extremely bad day... but Panthers or P4s would do the job just as well, if not better). Those then flank the overextended tank, or assault a different location, even the enemy base.
Just my uninformed noobish theorising.
Probably my personal order for best at defending a position would go -
1. Ostheer (bunkers + minefields + tellermines plus excellent AT guns and fausts)
2. Soviets (excellent single mine, good doctrines, very close to Ostheer, I'd be tempted to put them on an equal footing)
3. OKW (because of their flaktruk and single mine, but no MG, but a few decent doctrines)
4. Americans (M20 mine just isn't good enough when that's your only mine)