As ridiculous as her armor is, it shouldn’t actually matter and she is one of the few women of warcraft who could get away with wearing a Battle Bikini. Being undead, none of her internal organs should be functioning anyway, so getting stabbed or shot in the miles and miles of her exposed skin should only be a minor inconvenience.
Especially since she’s a banshee spirit possessing a dead body, and can change between incorporeal and corporeal forms as she pleases.
That’s as it *should* be, technically… but in Warcraft, Forsaken and undead get killed all the time. Maybe they’re only mostly undead.