Paratrooper and Ranger spam is not effective. They are expensive and can be easily punished late game by axis rocket arty since they ALWAYS have access to it. Rangers are a little cheaper and seen people zook spam them, but its really not that effective and super easy to punish as I said when axis can always get rocket arty and if its 3v3 or 4v4 they WILL ALWAYS get multiple rocket arty.
Ranger in Pershing is a thing, they're not really a problem.
Ranger in Urban assault is another story. You know the ability that smoke in a large zone and Rangers zook just sprint through your infantry line directly into your tank/arty behind and instantly delete a Panther with 9 zooks?
What are you gonna do with 3 Rangers 9 Zook & 2-3 Calliope behind?
Counter with PzGren - Callioped.
Brumbar - dies after 1st shot.
Werfer is MUCH MORE easier to dodge than Calliope, because of how short time Calliope rockets fly, with 24 rockets, vs Werfer long time rockets traveling with 10 rockets