In order to be a good father you always have to put your child's well-being first. that said there is no saying that a narcissist can't LEARN to be a good father.
Clinically-defined narcissists (people with a personality disorder) may be good parents to the extent that 'being a good parent' is part of their self-image. However, people who are clinically-definable as narcissists are rare; people who are merely self-centered can and do make excellent parents.
Yes!
There is no single answer to your question. It is likely that they may clash.
It's sad and unfortunate, but I have a similar problem myself.
Not good!
You grieve for the relationship you SHOULD have had.
yes
A man... A narcissist.
See an Elder Care lawyer IMMEDIATELY and do what they suggest.
Everyone can have a good marriage. It depends whether or not they get married twice, I guess.
Narcissist can be sadistic, it feeds their ego and gives them a sense of power to devalue and discard.
By getting a good lawyer. Seriously, that's really the only thing that matters; the fact that YOU THINK your soon-to-be-ex is a narcissist is legally irrelevant.
A malignant narcissist cannot magically shed his damaging patterns of behavior to bestow unconditional love upon his child. A good parent is one who places his child's needs above his own. A narcissist always places their needs first.