This racks my mind. OKW has an ability in Fortifications Doctrine that gives Tank Traps, Flak Emplacements, and Trenches whereas Defensive Tactics gives one entire ability, leaving only 4 more abilities in the commander and that ability gives one thing, tank traps that cant even stop a Panther or Brummbar from crossing. 2 undoctirnal units that are unaffected by it. So here are my thoughts about the commander abilities cause frankly this commander's litterally got nothing else besides the mortar and the MG
2 CP - 120mm Mortar Team
2 CP - DShK HMG
2 CP - Engies build Tank Traps and those AT land mines from Tank Hunter Tactics
2 CP - Cons build Trenches, those little land mines, and sandbags
8 CP - 152mm howitzer
Post your ideas too because I was a little uncertain on the last ability, I'm up for changes .