These are the division templates I use.
Division Templates Guide
Infantry Divisions
This is the most basic infantry you can make. You can use these as coastal defense or just fillers in a line if you have tanks. I use them on Germany and Italy to fill lines and defend.
This is the same as the basic infantry except it has AA. You should build this is your not expecting to win the air war just to make the cas less effective against your divisions.
This is AT infantry that you put where you expect tanks to be. Like as Italy and the UK you can put a couple of these in Africa or as the Soviets and put groups behind the lines to move in and counter pushes.
You should make this if your using the superior firepower doctrine as the allies. You can replace the infantry with mountaineers or marines if you want to have special forces. You can also cut this in half if you dont have enough equiptment and make 20width instead of 40.
This is a paratrooper division that wont just be meme it can actually hold for more than a second and prevent reinforcements to a battle or to land on around cities and distract the enemy.
This is a MP division for your garrisons if your expecting heavy resistance in an area.
Tank Divisions
This is just a basic tank division you can replace the tanks out and the motorized with mech if you have the production.
This is a division I would make as Germany when there is a heavy tank no air Russia the tank destroyers are there to pierce the heavy tanks.
This is a no air heavy tank Russia division the Heavy SPAA is there to counter the Germany Cas.
20 width infantry with 2 artillery are way better if you can produce artillery.
I’ll agree on AA; it is essential .
I build 2 line BNs of AA or SPAA (+support AA, or SPAA) in all my XXs,
you want to mess with MY XXs, there’s a price to pay .
my 2 cents:
-10 width infantry will get decimated by everything, do not build those unless in need to fill the line in early game
-20 width infantry should only have infantry battalions otherwise it lacks hp; with that in mind:
Always have artillery company if expected to stand up against enemy infantry, otherwise it just does not have enough soft attack to punish enemy infantry
AT support company to fight against light armor is viable in the early game.
-same with 40 width, artillery company adds quite a lot of soft attack and AT company adds hard attack for AT focused infantry; for AT dedicated divisions it is a good idea to replace an artillery battalion in 40 width infantry with 3 AT battalions
if possible, invest in AA company for everything if you don’t have enough air superiority/enemy has loads of cas