Your lists aren't bad, but when running Harkevich, drop the Juggernaut or Destroyer. Hark isn't going to be camping focus most of the time, even with only 1 or 2 'jacks on the field. On the other hand, Sorsha's probably going to be camping focus a ton more, but it's still a better idea to drop a 'jack, even though the Kodiak frees up the necessity to allocate more focus. But then again, I actually haven't fielded Sorscha much.
A little more infantry will actually do you good, as Khador is meant be, and plays as the faction that has tons of infantry and a few heavy, strong, and reliable 'jacks.