Narcissists have a grandiose image of themselves and expect others to share this viewpoint. When they do not then retaliation often occurs. Marriage to a narcissist is challenging, but divorce can be even more so. Narcissists perceive others as support staff and fans, so they have difficulty with the give and take of divorce situations.
A strategy to avoid divorce complications with a narcissist is to fly under his radar. Keep your head down and get through the divorce proceedings as quickly as possible. My collaborative divorce attorney had her methods of letting my spouse have the spotlight and feel important so he would not hijack the proceedings. She made a big point of asking him questions about his latest trip, etc. and finally his own attorney would ask to get the session going. Massaging his ego worked well in divorce negotiations.