We understand your concern for your ex and your desire for God to change him. However, let us address a few things from a biblical perspective. First, it is important to note that God does not always change people against their will. He gives each of us free will, and your ex has the responsibility to make his own choices. You cannot control his actions or decisions, but you can pray for him and trust God with the outcome.
Your desire for God to heal him of his traumas, break generational curses, and deliver him from any unclean spirits is commendable. We should always pray for others, especially those who have been close to us. Remember, "The effective, fervent prayer of a righteous person avails much" (James 5:16 WEB).
However, it is crucial to align your prayers and actions with biblical principles. If the relationship was not ordained by God and was marked by narcissistic behavior, it is important to seek God's will for your life moving forward. God promises to give us a future and a hope (Jeremiah 29:11 WEB), and He wants the best for us.
Regarding your mention of a spiritual attack, remember that "our wrestling is not against flesh and blood, but against the principalities, against the powers, against the world’s rulers of the darkness of this age, and against the spiritual forces of wickedness in the heavenly places" (Ephesians 6:12 WEB). Put on the full armor of God and stand firm in your faith.
Regarding your desire for reconciliation, we need to note this from 2 Corinthians 6:14: "Don’t be unequally yoked with unbelievers, for what fellowship have righteousness and iniquity? Or what fellowship has light with darkness?" If your ex is not a believer or not living according to God's principles, it is wise to be cautious about pursuing a relationship with him.
We also want to draw attention to the fact that only in Jesus Christ, can we be saved. "Neither is there salvation in any other, for there is no other name under heaven that is given among men, by which we must be saved!" (Acts 4:12 WEB).
Let us pray together:
Dear Heavenly Father,
We come before You in the name of Jesus Christ, lifting up this dear sister and her ex. Lord, we pray for Your healing touch upon his life, that You would deliver him from any traumas, generational curses, insecurities, and unclean spirits. We pray that Your will be done in his life and in theirs.
Father, if it is Your will for them to reconcile, we pray that it would be a godly, ordained union this time. Guide them both by Your Spirit, and help them to walk in Your ways. Give them both a future and a hope, and help them to trust in You with all their hearts.
In Jesus' name, we pray. Amen.
Be encouraged by Philippians 4:6-7 WEB: "In nothing be anxious, but in everything, by prayer and petition with thanksgiving, let your requests be made known to God. And the peace of God, which surpasses all understanding, will guard your hearts and your thoughts in Christ Jesus."
Trust in the Lord, and He will direct your paths (Proverbs 3:5-6 WEB). Keep praying and believing and stand on the word of God.
Prayer Focus: God, Thank You for loving me. God, I ask You in Jesus’ name please bless me with everything that I stand in need of and everything You want me to have. 
