in short - yes
in long - it affects, as long as you don't overpenetrate your target resistances
nirnhooded doesn't affect zaan dmg, because it's not dependent on spell dmg / max mag stat
infused + lightning (minor vulnerability) also affects zaan dmg, if you can't/don't want to run lotus fan for some reason
infused + lightning (minor vulnerability) also affects zaan dmg, if you can't/don't want to run lotus fan for some reason