More Occult nerd observations about Skeletá and some ramblings about Norse mythology.
In Peacefield, "Fate will find a way through the marches of Death and right back to the Bearer of Light." Lucifer, obviously.
We can agree that the guiding lights in the song of that name are akin to will o' the wisps, right?
In Cenotaph, the four classical Elements are addressed in the first verse; "the top of the mountain" = Earth, "night sky" = Air, "grave of the ocean" = Water, "connects with the fire" = Fire. It's also nearly in a common ritual circle casting order. The song as a whole can be interpreted as representing Spirit/fifth element/Quintessence as it deals with Otherworldly-type concerns (memories of loved ones that have passed on to such a realm, even if that realm is only that of memory).
De Profundis Borealis really hits as Winter transitioning to Spring, a mythological narrative of the impending birth of the Sun Child, and/or the Earth Mother reawakening.
Obviously, I don't know how much Norse mythology Tobias is familiar with, but it would surprise me if it was none. Scandinavian people in general seem to know it fairly well. See also: Amon Amarth opening for Ghost.
Anyway though, in Excelsis he sings, "Come with me to the rainbow's end/Come with me to the holy land." In Norse mythology, the rainbow bridge, Bifrost, connects the mortal world, Midgard, to the realms of the Gods, literal holy lands.
This ends my commentary that is specifically about Skeletá, but I blather on a bit more about Norse mythology and WWII below. Please don't feel obligated to read it. There is no direct discussion of any atrocities from that time, but please apply any appropriate CW/TW and keep yourself safe.
The reference in Excelsis isn't exactly 1:1 about Nordic concepts of death; in the mythology, the majority of people end up with Hel, and only the best warriors get to go to Asgard and either Valhalla with Odin or Sessrúmnir with Freyja.
But to me personally, I don't think "warrior" has to mean literal soldier who saw active combat. I think someone who battled mental or physical illness, abusive relationships, overall hardship, those are warriors too. And going to Hel isn't a punishment anyway. It's peace and rest. She's terrifying to look at but isn't cruel in the least.
Lastly, it isn't like there still need to be warriors gathered for Ragnarok. We have the story of that battle, we've been told that Ask and Embla began a new family that re-populated Midgard.
Fun fact, that's why Evil Charlie Chaplain called his group the Third Reich, their aim was to jumpstart the third age of humankind with the "ideal" genetics. We're already in the second age, according to Norse and Teutonic mythology, with the first age being that of the Gods. This is also the reason for the unfortunate conflation between Nordic symbols and white supremacy. That group co-opted that mythology to represent and justify their hatred.
