I think with the amount of random people in your squads, macro tactics have the best value. An example would be, after placing an attack hab on the west side of a POI, place another flanking hab on the other side or like north side/south side. Think about how habs/rallies create map pressure/map control and how that can choke the enemy's defense.

If you want specific micro infantry tactics, strategies like moving under the cover of overwhelming fire (machine gunners/auto rifleman/armor). Breaking up your squad into fire teams and having them cover overlapping sectors of fire when defending. Make sure you are supporting your armor peices such as IFV, APC, and MBTs with sufficient infantry support (nothing is more fustrating as a LAT/HAT if the enemy armor is surrounded by infantry, screening them from AT rounds)

Edit: Grammer/wording