I wrote another piece, about that topic: https://medium.com/mind-cafe/how-to-become-useless-for-the-narcissist-and-get-them-leave-you-742d24e0b68

And my narcissistic abuse book has been just published. Check it out here:

https://www.amazon.com/dp/B088F4K2SF

Not sure there is a tailored solution in there for you, but it’s worth checking out. Stay strong!