I have the Dark triad traits in spades man. They are absolutely dark.

In a war game scenario, dark triad will suggest a nuke where someone good at managing these traits in beneficial ways would have a far better plan that eviscerated the enemy and then indebted them to us in the process with minimal bloodshed, not cause they care about the individuals, but they have less to gain with less bodies relying on them.

In moderation, yes these are advantageous to war and success in it, when you have them in spades: trust me when I say that the avenues of success are going to be brutal in ways a non triad person wouldn't see until it was over, and they would be horrified by how it was all done and manipulated to the psychopaths benefit.

These are very dark traits and they aren't exactly welcomed by all of us who possess them.