Team games opinion:
First off. Don't lose your rifleman lol.
2x Riflemen with a single BAR or M1919 upgrade is usually good enough for me, late game. I like to pair a rifleman squad with an officer squad so they can have both smoke + grenade and tank snare if I need. Its a flexible and inexpensive combo but can deal with most threats.
I like to spread my weapon upgrades so all squads have at least 1 before giving 2 to one squad. That way you mitigate the loss. Officers get priority for double upgrade because they get speed at vet3 which lets them fight more so you get more value for your weapons.
My personal timing for weapon upgrades is after officer squad + upgrade. So somewhere between officer squad and your LV/MG/Pak Howie.
Late-game anti-inf comes in the form of Sherman and Calliope. I don't use the Scott much as the Sherman is much more flexible. Always have 1 Sherman supporting your pushes whenever possible to deal with Obers and blobs.
M36 is your main source of AT. Don't trust rangers for your AT. Ranger 3x zooks works but not every commander has rangers and it bleeds like crazy. If you must go rangers, always better to get 2x Rangers with 6 zooks so you have more alpha damage, just don't ever lose them. ATG just sucks, don't bother. Its better to spend it on another RE squad with a zook since they can help repair too. Your starting RE with 1-2 zooks is good for early game to deal with LVs along with LT with 2x zooks if you're really struggling.
