In general, Necromancer leadership is almost the same as Wizard for humans. The chance is small, and the benefit is questionable. As a result, it's not considered during character development in 99% of cases.
Please don't post in this thread anymore, as I've exhausted my "huge" potential.
Bow down and hear our cry,
Our earthly rulers falter,
Our people drift and die,
The walls of gold entomb us,
The swords of scorn divide,
Take not thy thunder from us,
Take away our pride.
G.K. Chesterton: English Hymnal