Protos Angelus.
Early game/first 5minutes non-doc
If OST digs down:
SOV: clown car, mortar,sniper, zis3 barrage. easy
UKF: UC,UC carrying IS's past MG, later Mortar,sniper. not so easy,needs time
USF: mortar, later smoke officers. not so easy, needs time
If UKF digs down:
OST:mortar,sniper. not so easy, needs time
OKW: nothing to see here, move along!
Sure, mortar can work but going US mortar is just straight up garbage. In teamgames at least, if you lose the engagement or forced to retreat, you help your teammates until you get pak howits or AA HT. Mortar is a big manpower sink and it's not guaranteed that it will manage to force retreat of the MG.
Soviets have no problem against digging down
UKF only has UC which can be risky if the MG is supported by one gren.
Countering UKF dig down on 2v2+ modes usually revolves around pios vision + sniper or mortar. OST mortar is pretty good vs UKF as they have no counter for mortar. Generally you don't bunker down vs OST, they have the best early mortar and grens have the long range rifle nade which in skilled hands can be disastrous.
As OKW you have no early game vs Vickers in building and if the UKF is going UC, you absolutely have to get the T0 raketen which can be great when AEC gets out (at which point you have fausts and maybe sturm shreck).
OKW does lack a bit early on. That's a no-brainer but overall they are a strong faction. I remember when OKW was released. It was all about "Don't let OKW go late game". That's why they are the only faction that has a super heavy tank stock and the only faction that has no caches and relies on scavenging.
OKW starts out strong with sturms. Advances with a bit weaker (and cheaper) volks (until STGs).
Upgrades into either heal or mech. Heal usually preferred because of the flak and leig and at that point your power just goes UP with elite infantry. Raketen preferred once the ally vehicles start rolling out.
And one more point since people complain that getting raketen, you lose a lot of AI power (same as how getting AEC you lose AI power but gain AT power since AEC is useless vs infantry) since OKW has no insta faust.
USF snare is locked to vet1 so nothing for kubel, which makes it great not only vs UKF but also USF early game to cut off snipe from a distance with one supporting infantry. USF also has no AT unless you tech to captain or weapon rack (slows down AA HT which is needed in most games if anything to kill planes later on).
Don't complain that OKW is weak or sth. It's a strong faction that has it's ups and downs as all factions do. And OKW has that God of all lockdowns called Schwerer which is great when bunkering down. Play allies and you'll see that there is no "OP faction" for any stage of game. Every faction is of the same strength when starting but those strengths are pooled into different categories.