Sometimes avoiding narcissists is impossible no matter how hard you try & how much knowledge you have about Narcissistic Personality Disorder. When that happens, there are some ways that you can fluster them enough to where they will want to leave you alone.
If you have & enforce good boundaries, narcissists won’t like you. A good victim has weak or non existent boundaries. If you have & enforce your boundaries, a narcissist won’t know what to do with you. They may try to make you feel stupid or wrong for having them, but when you are secure in the knowledge what you are doing is right, their gaslighting won’t work.
Having healthy self esteem is a huge turn off to narcissists. The lower a person’s self esteem, the easier that person is to control. Similarly, the healthier a person’s self esteem, the harder that person is to control. While narcissists often enjoy the challenge of controlling a person with healthy self esteem, they will give up when they see that person isn’t going to tolerate their abuse.
Knowing about NPD is also a huge turn off to narcissists. Even if you don’t explain the ugly details of narcissism to them or call them out, so long as you know what these people are like & what they are capable of, it will be a problem for them. Narcissists don’t want anyone to figure out what they are doing, because a person who understands their games cannot be controlled or manipulated, & won’t create any narcissistic supply.
Self validation is a powerful weapon against narcissists. They want their victims to look only to them for validation. A person who doesn’t need the narcissist for validation won’t provide any narcissistic supply or be controlled by a narcissist.
Understanding that no contact is a very viable option gives you strength when dealing with a narcissist, & they can’t handle that. Narcissists want to be the ones in charge at all times. If you know that you have options, & don’t have to let the narcissist make all decisions in the relationship, you will become a problem to a narcissist.
If a narcissist knows you don’t need him or her, you become a threat. Narcissistic parents & spouses in particular like to make a victim completely dependent on them, preferably financially or emotionally. If they see you are well aware you don’t need the narcissist, can leave the relationship anytime & still survive just fine, you won’t be a good victim to the narcissist.
Avoiding all narcissists seems to be impossible, unfortunately. However, if you can implement some of these tools, you will be able to handle yourself very well when you must deal with them.