I would like to suggest guidelines where to set up head quarters especially company and above my experiences are subjective but radio communications often break down when traveling and work better on elevation. Most players don't worry about C3 the scenario of Aachen in Final Blitzkrieg was typical. I maintained more or less an effective communication. Also used skilled and motivated troopers as scouts give them orders to make contact and allow them to break momentarily the C3 web and report back asap once the objective has been met. Use conscripts as canon fodder is not on in real life. Our C3 is actually C4 as we use a computer. For a WW 2 commander have instant situation awareness by a digital screen was pure science fiction. Market Garden failed partly as Urquhart lost all contact in the beginning of the campaign. They got as far as they did because everybody was informed of the objectives prior the battle. I use this principle during the game. Give orders when there is still full C3 and allow change of decisions based on experience. Everyone in a fire-team who is isolated can take decisions up to the rank of platoon leader. Platoon leaders can take decisions up to company level especially if there is a +in motivation, After all in the military you're supposed to have knowledge ideally 2 ranks above your own.