Why would you think that a lich has unlimited resources and infinite minions when Aundae vampire does not? As I sad most of Aundae are former Telvani mages, Telvani are well known for their necromantic skills, which are banned publicly but everyone know they practice still. It matters little if you have meat on your undead bones when it comes to that skill - you either know what to do or you don't. So if one wants an undead army Aundae elder would most certainty be able to get one with little trouble, the only reason they don't do that is because as Telvani mages they don't have any desire to take over the world - that kind of power just distracts from accumulating more knowledge, humans may take care of themselves as long as they don't interrupt the piece of the layers - food that herds it self is a comfy concept.
And any necromancer worse the title woun't allow himself to be recruited and follow someone eases whim for the instruction to transformation - it's a paths that one has to walk alone, you either have the capacity in both knowledge and spirit or you don't so anyone you would be able to recruit would be a talentless wannabe and hardly be worse the time it took to recruit them
