A clear distinction has to be made between the FACTUAL pillar and the PSYCHOLOGICAL pillar of any cross-examination or deposition of a Narcissist.
It is essential to be equipped with absolutely unequivocal, first rate, thoroughly authenticated and vouched for information. The reason is that narcissists are superhuman in their capacity to distort reality by offering highly "plausible" alternative scenarios which fit all the facts.
It is very easy to break a narcissist - even a well trained and prepared one.
Here are a few of the things the narcissist finds irresistible: