well now the problem I am facing is one player wants to play a necromancer...and considering the main bad guys are necromancers/demon summoners/baby eaters, it would jive right to have a necromance as a good guy
any thoughts of how to halp me?
Since he is new to D&D I wonder (and bet) that his comparison to how the necromancer is played/powered is from computer/video games. The typical necromancer there is different than the D&D one is.
For brand new players I would start very slowly - use basic classes and relatively low level (like around 3rd or so).
Diffinitely not 7+ where multiple presitge classes come into play.
Low level helps remove the choices available and thus helps the players focus on the role-playing and character development part of the game. It is after all what truely separates D&D from video games.
Oh and low level helps the DM out considerably too - less choices/options to worry about.