The advice you've received is very solid, Grens and to a bit of a lesser extent the MG42 are pretty much your staple, consistent units for Ostheer. Gl hf without them
Now putting that aside for a minute, I also enjoy trying out new things and tinkering with the conventional, so i'll try throwing down a few of my experiences with the encirclement doctrine and you can pick from that what you want. I've had success vs top 50 players in 1v1 using unconventional builds with encirclement, but the fact is, if your experimenting, be prepared to fail and take it in your stride, par for the course if your off the beaten track. Take what you can from it, what worked, what showed potential and what fell miserably on its face.
Pios with encirclement aren't complete junk as combat troops in the early game due to sprint, at close range, they make a decent cheap and cheerful assault gren impression. Mainly you want them for capping though, but keep in mind, they can 2v1 cons/rifles handily enough. As the game goes on and units get vet and simply weight of numbers in favour of allies, this won't work though as Pio vet is related to their engineer duties mainly instead of combat. With a flamer though, a pio squad is grand, in the same vein as combat engineers for soviets, except with sprint.
With that in mind, you may be interested in experimenting with a multiple pio start, anywhere from an additional 1 or if you really want to risk it for a biscuit and get early map control, 3/4 additional pios.
So something like, build 3 pio squads (giving you 4), into a quick t2 as you save the initial fuel for t1 building and grab yourself two quick 222's vs USF on open maps, on urban ones, Pgrens instead and tellers (leaving you the option to grab shrecks when the inevitable light vehicle comes, if it dodges the tellers). Then backtech to grab an Mg42 or two to hold the map that you take. At this point you'd have to make a judgement call if they have had enough fuel to get t3 and a tank, if so, you'll need a pack, if not, get yourself a sniper/Stormtrooper squad. I'd really only recommend the stormies if you have the 100 munitions for the upgrade spare (and remember to use cloak and hold fire to pull of ambushes).
You could try for t4, but its a hard ask, if your not quite there fuel wise, the p4 supported does a grand job, just keep in mind how deadly jacksons are.
That is just an example of how I might go about formulating a build vs USF using encirclement, if I really wanted to get the units you listed. So the questions i've asked myself when answering your post are:
How will I get map control? (Early Pios)
How will I counter that 1st light vehicle? (222's on open map/tellers& Shrecks if needed on urban/closed maps)
How will I spend my munitions? (Healing, sprint, and as above depending on the map)
How will I win the manpower war? (By using manpower efficient units via my tech, e.g. Pgrens/222's/Stormtroopers/MG42/Sniper)
How will I tech to capitalise? (t3 if not going well and p4, t4 for panther if going well)
Edit: How much can I comfortably micro? (Often forgot, but units like the ost sniper/light vehicles for example put a tax on your micro)
Anyways that is all pie in the sky, just a rough build i've pulled from my behind and how I thought about it. Hope it helps and sorry I can't give more specific answers.