General Headquarters Composition Notes
German Army List has Engineer units with same kind of HQs as infantry units.
Note: German army treated engineer units as specialized infantry formations. They had infantry training with additional engineer training and engineers were often used directly as infantry units in emergency (more so as war progressed).
Major factor with artillery is ability to commit counterbattery fire. German artillery was not terribly good in WW2 but it was definitely better than Russians were. Best counterbattery values are dedicated Supreme HQ assets and motorized units (that had highest priority in equipment and manpower).
Counterbattery ratings should be based on following:
SHQ units with dedicated HArko or Arko (AR6).
Motorized units (AR 5 or 6)
Infantry (AR 4)
Second-line Infantry (AR 2 or 3)