https://www.youtube.com/watch?v=238zU5UOreY is a conference talk from a Cluster B expert about the topic, highly regarded at least by his peers. For better or for worse, the speaker is actually a diagnosed Narcissist and Psychopath who previously went to prison for his crimes he committed during his employment as a high ranking official in the Israeli government, but I argue that makes him the best person to listen to, at least on this exact topic; sort of an insider view.