I believe that the "solutions" are going in the wrong direction.
To find more appropriate solutions than simply adding in a bunch of new spells, let us first examine the issue.
When you say that necromancers are the weakest of the wizards in the game, how are you defining weakest?
If you mean that their spells are the weakest, I would say there is evidence quite contrary to that line of thought. Many of the necromanctic spells are either outright death spells, or spells that weaken the enemy in some way to make them easier to kill. In a pure PVP situation, they technically have quite a good baseline to start from. They even have a healing spell, Vampric Touch, that when used properly, can heal a wizard .. perhaps even better than a cleric can heal them.
If you mean that their total number of learnable spells in game makes them the weakest, then again there is plenty of evidence to the contrary. Necromancers have, excluding Mages, the greatest number of availabe spells to learn in game. They have the most spells available to them on their spell list of all the wizard specialist classes. In fact, the weakest specialist class in this sense is the Invoker's guild. If you want numbers, this link here shows the product of Selveem's research that he passed on to me and that I posted on the forums.
viewtopic.php?f=77&t=14262&p=91305&hili ... ols#p91305
If, however, you mean that by weakest they have a disproportionate number of spells on their spell list that are not in game, (or are blocked due to alignment issues and trainers) then yes there does seem to be a strong argument for that. Although, to be honest, all the guilds suffer from this, more so with spells not in game than with alignment issues, though.
The solution, I think, would be to first start introducing the currently available spells in game before making up new ones. I would even go so bold as to suggest that the introduction of spells not be sitting with a select few that will only pass them on to people in their circle but that the spells be readily availabe to the player base.
Sometimes this game gets to feel more like it's about "who you know on IM" or "Who you annoyed that then tells everyone on their IM list about" rather than "what and how you play in game." But I digress, that is for another day. However, I mention it because I would hate to see the introduction of feats, spells, skills etc.. both in game and being introducted in the future, follow this route of passing on the knowlege. Everyone should have the chance to learn feats, skills and spells. We shouldnt always have to bug Gwain to teach us. (Not that it isn't fun to bug Gwain...)
Seek ye victory? Ye shall eventually find defeat.
Seek ye defeat? Ye shall most certainly find it.
Seek ye nothing? Then all ye can find is victory.