The most efficient use of suport comapanys is on big divisions, you save the numbers of equipment requierd per division and get the same effect as for small divisions and in the same time you increse the organisation lvl of the division on avrage.
In MP games as germany i use only 40/44 wide divisions. Makes me track all my divisions far mor better and its more efficient. Now you ask why 40 or 44, well a battle from 1 direction is 80 wide and any additional direction is 40 and if your troops ar comanded by a field marshall with offensive trait that give 10% wide ... so 44.
40 wide Inf. Division :
-14 inf
-4 arty
- suport logistic, eng, recon, hospital, signal
This div is superior then 2 avrage 7inf 2 arty division. And in the same time you can swich 1 arty for 1 inf and 1 AT
I still ironicaly lough when ppl talk about how many divisions they got or can do ...numbers dont matter, division strenght
Matters.
Btw for Panzer div:
-7 medium/light armor
-2 spg
-10 moto/mech
-eng, log,recon,hospital,signal
Mobile div:
-15 moto/mech
-2 spg
-2 td
-same suport as above
Why 2 tds in the moto? To hold the breakthru line when you encirle huge army and repel the enemy tanks that try to save ther encircled troops