You’d think, but that probably won’t happen unless one of them recognizes and accepts that they’re much lower-status then the other.
Narcissists don’t do well in groups, especially when they’re all roughly equivalent status. There’s a ridiculous amount of infighting and posturing as they try to establish dominance over each other.
Watch Musk or Trump when they have to deal with something who reality requires them to defer to (eg, like Xi or Putin). They look almost depressed and broken, because in a very real way, they are.
What you’re describing happens when a sycophant praises a narcissist, or when a narcissist is drunk on praise from a sycophant. That’s when the rhetorical fellatio really kicks into high gear; when the narcissist is getting high on supply.