I feel like they don’t argue as much as they should based on their sadistic behaviour in other aspects.
Like literally how do their relationships work. Do they just threaten each other when they need something?
These people in particular are especially vile and manipulative and evil. They are also sadistic and hold grudges like there’s no tomorrow.
How tf do they get along with EACH OTHER?
the concept of Dark Triad traits is overused early 00’s pop psychology
it’s like BMI: fine for applying to a large population, but breaks down when looking at an individual
even if useful at the individual level, “dark triad” indicates three traits but says nothing about the balance between them, e.g., a high mach and a low narc pairing will looking very different than two high machs.
IMO it is not useful to oversimplify any single relationship down to “two dark triads”.