All Mistmoore vampires are "named", but only some are truly Named Monsters. The "normal" ones are all redirects to Mistmoore vampire.
Vampires retain the class and skills they had when mortal, hence this page indicates they use all 4 DOT types, but an individual may use one, all or none.
Factions
Killing this monster gives good faction with Lyrech
Killing this monster causes no change to faction with Mistmoore