2 penals with flamers + 2-3 guards works well as main infantry force.
The problems with conscripts is in late game that, even if they survive better with vet3, the damage output is very low vs vetted infantry.
Right now you can just pick ppsh doctrine and enjoy yourself.
Conscript support tactics, while far from meta is rather valid choice for playing swarm of infantry and light armor with incendiary barrage support.
Even NKVD disruption tactics would be awesome if instead of rapid conscription it had ppsh.