im really surprised by the Votes. Terror is the #1 feared doctrine in EIR. probably due to the fact that it buffs so much and you cant really go wrong with terror due to the doctrine covering all corner of the game.
Followed up by Armor doctrine?!?!?!. probably from the dual callie massive AI ability
Moving repairing pershings, light vehicles, tank destroyers and Shermans.
Raping HVAP tank destroyers too.
Capping T17/M8 Armies supported by blob of anti tank guns.
Those'd be one of the reasons