The Word of God lets us know that Satan has a structure; demons are of a different hierarchy. But it's important to understand that we're not on the same class or level with Satan and His demons, no matter how high they are. We're seated together with Christ in the heavenly realms, far above all principality, power, might, dominion, and every name that is named, not only in this world, but also in that which is to come. We're superior to Satan and the forces of darkness.
Therefore, in dealing with demons, we don't struggle at all; we don't bandy words with demons when casting them out; we give orders. When you tell the devil to come out, he's under obligation to heed your voice, because you're addressing him in the Name of Jesus. Jesus used the strongest word possible to describe how we should treat demons. He said, "Cast out devils!" That means, "expel", "eject", "thrust", or "pluck" them out!
It creates the picture of grabbing something like an imp or a little monkey by the neck, and thrusting it out vehemently through a window or the nearest exit. That's what Jesus said to do to devils in His Name; no negotiations! Pluck and throw them out with your words. He gave us the authority to do that, and He didn't give us limits! He didn't say, "If the devils are very close to you, you can cast them out, but if they're far away, it'll be difficult"; no! It makes no difference where they are; once you can discern that Satan and his demons are the ones responsible for the situation, you can issue the command from South Africa, and they'll hear you in Australia and be gone!
We've been given a Name that's above every name — the Name Jesus. The Bible says, "...at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth" (Philippians 2:10). So, it doesn't matter how high in the satanic hierarchy the demons are, when you speak in the Name of Jesus, they have to obey! Give the Word, and wherever they are, they'll scamper in terror!