you dont have to give camo to all your units. unless you are floating in munitions. here are the uses of the jaeger comand skill.
camo. grenadiers with cammo are good for scouting make them so that they dont shoot. leaving your squishy sniper back. while they hang in the front of your hmg or at. and if a tank or a car comes. surprize panzer out of camo the soon to be dead vehicle.
a camo hmg is a very hard to kill hmg.
camo panzer grenadiers are very good for ambushes.
the g43 is a beast in my opinion. (not counting that i like the sound) it is also very good with your grenadiers giving them a higer damage and a nice skill to interrogate fallen enemies.
G43 make Grens say,
"We've done something useful today!"
indeed.
the tactical movement can help move your troops back and forth from the hq or make a sprint for an assault.
the arty skills are pretty self explanatory.
now in game this is how i implement it.
frist i beging with the asortment of suport weapons hmgs mortars. then come the infantry.
i give my greens (usualy 2) both hmg and g42 upgrades. then build panzer grenadiers and give them camo. in combat i use the greens attack move comand while i micro the panzergrenadiers. for the close combat. the damage the greens deal when stationary is a great complement of the damage+disrruption the pgrenadiers do. by that time i should have won most of the early engagements and control of the map. if you havent. then you are doing it wrong. the end game goal is to have vet grenadiers suporting your tanks. and then win.
my main use of cammo is scouting. for my hmg and AT nothing beats them if you have time ahead and you know whats coming.