What happens when the narcissist knows you’ve figured them out
To confirm your ‘wrongness’ in any department, is sufficient to cover all bases, including your suspicions about them.
And by invalidating you, and your views, they reinstate their control over you. And ultimately, control over themselves. The threat you presented, has been eradicated.
Amplification of their ‘go to’ methods
As stated, flavours of narcissism vary. As do preferred modus operandi.
Some are fans of aggressive physical/verbal violence & bullying, some the ‘poor victim’ approach; some are gaslighters extraordinaire stealthily and steadily breaking the trust you have in yourself; some the illusion that they are, above all else, the world’s greatest giver and lover.
Whatever their primary go-to is, expect this to be amplified. They will use whatever their ‘forte’ is, full throttle.