6. the Luftwaffles doctrine is the worst OKW doctrine.
I don't know why what level you are or what type of games you play, but for 1v1 that's certainly not the case.
The Falls are arguably the most versatile elite unit in the game considering their weapons, cloak, grenades and DPS, which means they have a solution for everything. Combined that with the Amazing Valiant Assault ability which you will often have sufficient munitions to use several times in the late game, you are looking at a quite solid (but somewhat situational) doctrine.