If we learn the tactics of the narcissist we will know the tactics of the devil. The narcissist is a pawn in the hands of the devil, helpless to be anything but what the evil one causes them to be. His tactics always use the greed and arrogance of the human heart as he manipulates them into monstrous attitudes and actions.
"Put on the whole armour of God, that ye may be able to stand against the wiles of the devil. For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places."
Ephesians 6:11-12 KJV