What slows down our mightiest commanders from taking buildings and scoring points is when they get stuck in the "Que". A big point of this, is each battle takes the same amount of time, even if the attack / defender is significantly stronger than the other. So the resolution for this is to have our strongest commanders focus on offense. We build a strong wall on our defensive structures. This will deter the enemy from advancing. 

  Another strategy to help with not getting stuck in the que, is to spread out. Don't send all three of your marches to the same point. Send each march to a different structure. This way you aren't hindering yourself in the que either. We don't want to all dogpile on to the same point. This isn't football or soccer where there is one ball. Think of the field as having many balls and each separate ball helps you achieve a goal. If someone takes one ball from you, then get a different one.
  Another point to be made with this, is a the age old saying, the best defense is a strong offense. If you cut off the enemy from advancing, you have essentially defended your own point while also capturing an enemy structure. If you cut off the point from reinforcements, your own weaker members can take down whoever is attacking.
  Of course, this separating offense and defense strategy is not perfect. You will have to sometimes fall back and stop a very strong commander from steam rolling your team. But the main idea for this strategy is, regardless of might, you don't want to be stuck in a que. Keep each of your three marches constantly engaged in a separate battle, avoid the que.