As Christians, we don't need deliverance from the devil, for we've already been delivered: "Giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light: Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son" (Colossians 1:12-13).
You might then wonder why Jesus taught the disciples to pray, "And lead us not into temptation, but deliver us from evil..." (Matthew 6:13).
Jesus gave His disciples and those in the Old Testament this model of prayer because, at the time, the evil one—Satan—still had power over them and God was their succour. So, they had to pray to Him to deliver them from the evil one.
But in the New Testament, after the resurrection of the Lord Jesus Christ, there's no place in the Bible that suggests that we should pray about the devil, or ask God's help against him. Satan and all his demons are under your feet; keep them there.
The most beautiful part isn't that you've been delivered, but that you've been made a deliverer. Every Christian is a deliverer. We're not the ones needing deliverance. We're the ones giving deliverance. Our opening verse in the New International Version says, "Deliverers will go up on Mount Zion to govern the mountains of Esau. And the kingdom will be the LORD’s."
We're champions from Zion, anointed with the Holy Ghost and power to heal, bless, deliver and transform lives. We're the hope of the world! You're in the earth as an answer to the cry of many, to bring them out of darkness, into the glorious liberty of the sons of God. Hallelujah!