In the ancient rite of exorcism there is a specific call for deliverance…
By the mystery of your holy incarnation,
By your coming,
By your birth,
By your baptism and holy fasting,
By your cross and passion,
By your death and burial,
By your holy resurrection,
By your wondrous ascension,
By the coming of the Holy,
Spirit, the Advocate,
On the day of judgment,…
This encompasses the power of the gospel which defeats Satan & his demons. These truths should be presented when dealing with demons. They abhor these vital sacred truths as they stem from the triune God and the Son, the Lord Jesus.
These truths weaken demon powers. No wonder the church included these truths in the rite of exorcism.
Speak of the cross (the blood shed on the cross), the resurrection, the Holy Spirit, the holy ascension….