CHARGE, ALL ABOUT THEIR CHARGE. Flanking unit, Hero Killer unit, what else more to say? Spam charge. (Last doctrine can be Unit Damage V or Mobility V, I have a default sprint doctrine on them right now at the moment because I find them still too slow for my liking and allows me to get to my preferred positions faster. The reason they have charge damage reduction docs on them is because that's all they'll be doing, so might as well try to make them survive for as long as possible during those).