How did/does powerplay affect your relationship with another narcissist/cluster B?

I just had to end a relationship with a covert narcissist because both of us are huge control freaks.

From my side, my BPD makes me super jealous and I always want to know what he's up to/prevent him from being attracted to other people or potentially cheat on me (I know, irrational as fuck). There's also a certain, mild need to keep the upper hand in most situations. I've been raised by a covert narcissist mother and a sociopath father, so throughout my life I've sort of been "taught" how to stay in control of situations/people.

This guy is a huge manipulator and from the very beginning there were always subtle signs of him wanting to be the one in power, even for trivial things. For instance, agreeing to be online at 10 pm to play an online game and would intentionally show up late, just to keep me wondering why he wasn't there on time (like this one many other similar); once we were "official" he stopped liking my social media posts. Stupid things that added up. Overtime when arguments and what I assume was the devaluation phase started, he would always resort to silent treatments/stonewalling/blocking me specially in situations where he knew I was right or had a fairly reasonable complaint, where he would end up in an unfavorable position. When things would go back to "normal", he would always do something to disrupt the balance and pull the power dynamic back in his favor too (and I'm talking about things he pretty much did out of nowhere and didn't make sense).

For some months now, we've been stuck in a dynamic where he blocked me only on our main source of contact, but everywhere else where I would send a message, despite of not answering, he would read them on time. I was constantly insisting him to talk to me so we could fix things and in return there was a lot of indirect baiting behavior and odd online actions from his side based on whether or when I would keep trying to contact him or not (and this confirmed by my therapist). He clearly had no intentions of talking to solve our issues, but also refused to end things and on top of that went out of his way to keep control of the situation. This eventually led me to realize that, to him, powerplay and keeping control is more important than the relationship itself. It was 3 years of emotional seesawing. Every time things would reach a point of stability/balance, he (sometimes me as well, but it was him the one who constantly did it and in more intense ways) had to do something that would outbalance the situation and put him back in a power/control position. If you ask me, our relationship didn't work because both of us are huge control freaks (apart from other things).

Yeah, I've been reflecting on all the shit that happened for a long time. But for some reason I've been able to pinpoint the powerplay and control patterns of the relationship now. And this is one of the many interesting dynamics that happen when you put two cluster Bs together. So I'm very curious to hear your opinion on this? If you've been/are in a relationship with another cluster B/at least narcissistic person, how do those dynamics play out in your case? Is/was there one of the two who clearly had more power than the other in the relationship? How did the other person handle that? How did it turn out?

Also, do you have any info on this? I've tried googling and asking chatGPT but can't find much. And since chances are I'll probably end up pairing again with another cluster B/narcissistic person, I'd like to be more conscious about it.