Also, you do not need narcissism to destory people. That is more of a Machiavellian thing to do...instead of narcissistic thing to do
You're on the right track. But the mistake you're making is when you say "need to destroy." You're making it about the other person. It's less about destroying them and more about getting them to suit your needs. Whether they are "destroyed" or not is irrelevant, unless that is your goal.