In my opinion , the osttruppen doctrine is an early game commander.
So why not let him the arty officer and instead of the trenches give him a Stug E.
or maybe a Stug A (a stug e without explosive shells, like the stug e in the early campaign).
Make this commander an early attack doctrine.
Stug-E might be an idea. Though, I'm not sure how safe it is to create a commander that's able to "script" a very powerful build order that's difficult to counter (see current Penal Lend-Lease meta, former mortar-into-stuart meta, etc, etc).
For the infantry jäger doctrine I would recommend stormtroops instead of the arty.
This doctrine needs a call in and stormtroops would fit to the name of the doctrine.
That still wouldn't make me pick this doctrine over, say, Elite Armour. Why? Elite armour also has stun grenades (which deal OP damage, btw), and you also have the Tiger Ace option to go for.
Lightning War needs no introductions. Laeger Infantry and Lightning War share 60% of their abilities and, then, it becomes a question of whether you'd give up ostruppen reserves and Tiger for the other two abilities.
Finally, for stealthy stuff you have Storm Doctrine and Encirclement doctrine.
Then, the other infantry doctrines that OST has are:
- Ostruppen-related ones (especially with reserves; Lightning War has this base covered too)
- Doctrines assisted by a command P4 (which makes infantry super-tanky)
- Mechanized infantry doctrines
The only infantry-like doctrines that aren't as well deveoloped as they should are the mechanized doctrines, and they are the ones that could really benefit from a price readjustment.
Thanks for the quick update!
I guess the trouble with this Doc is that - thematically - its hard change it without simply adding cheesy stuff like AT partisans... Maybe make it an Anti-any-vehicle doc and give Maxims AP ammo ability or maybe allow cons or Penals to place AT mines... that way you might encourage or 'allow' for non-con spam strats.
Having read some of the suggestions in this thread, I'm more inclined it to rework this doctrine into a "Soviets ambushing German armour" kind-of doctrine. e.g., hulling-down their tanks to camouflage them, having some Conscript squad with crappy camouflage waiting in corners, camouflaging their AT guns, planting mines and, hell, maybe even a B4 to lure the enemy to attack (also, since B4 also has some anti-armour ability).
Luckily, tank hunters consists entirely out of unique abilities, which we can change at will without having to jump through hoops.