Hurt people do not hurt people. The narcissist is not hurt they are just evil.
God will never change the heart of someone who does not want to change. When God told Jeremiah to stop praying for his nation it was because the heart of the people have become so hardened that their heart could no longer be changed.
Jeremiah 11:14 " 14 As for you, do not pray for these people. Do not raise up a cry or a prayer on their behalf, for I will not be listening when they call out to Me at the time of their disaster. "
Isaiah 26:10 "10 Though grace is shown to the wicked man, he does not learn righteousness. In the land of righteousness he acts unjustly and fails to see the majesty of the LORD. "
God will never change the heart of those who love their sin. All of us have been hurt from time to time, even a lifetime of hurt, but we do not continually hurt others because of what we have been through. In fact many of us who have been hurt can't stand the thought of hurting others because of how we felt when it was done to us.
We can never use the excuse that someone hurt us to justify hurting others. We ought never to minimize the bad behavior of others to their victims by declaring how hurt the perp is. Bad behavior should be treated with a rebuke not compassion.
It is unjust to pressure the victim to forgive while coddling the narcissist, enabling them to continue using excuses for their behavior.
The best way to help someone learn to stop bad behavior is to tell them it is bad and refuse to engage with them if they refuse to stop it.
Just saying!