[Lazy_Perfectionist]

Not always, Ich. For a few nations, there is a certain easily countered overlap. MA Agartha needs enchantment for Earth Blood Deep Well and their golems. As soon as your opponent sees Earth Blood Deep Well go up, they'll make opposition a priority (if astral nation). Late era Agartha has all its undead conjurations, and Well of Misery is conjuration also. To counter that, all they need is Dust to Dust (though Sepulchrals and Cave Wights are tougher than regular Wights), or Wither Bones, not to mention Undead Mastery.