Mammoth Volume for heavy prog or exp/post metal

if I would compare this band to other Scandinavian bands of similar sounds I would say Dungen and Motorpsycho, alternative rock background but the songs have progressive approach and tendencies of older bands, but have incorporated a new twist to new or modern progressive rock, i would add this band cause they are to my something i have not quite heard any who sounds like them and that is interesting, to have a distinct sound or experimentation is rare in today’s hard rock /metal world, i think this band pull this off, i think they should be evaluated in post/experimental metal sub, but also with eclectic rock ears and heavy rock ears, yes they have songs that are doomish so then exp metal is closest, but remember that this is that times music, and this band is progressively moving the boundaries for a doom metal band, but also as a hard rock band, in more ways than just adding a keyboard, organ and mellotron, they have twists in the riffs, in the grooves and sections which is not close to doom metal, some math-rock elements suddenly, folk rock, jazz, prog unisons, even some counterpoint,, even Gentle Giant albums have straight blues rock songs with prog twists, and folk ballads with no twist, but it ads to their eclecticism and that is why Giant is eclectic cause they have all music in one album some are twisted prog experimentation, but also songs that are close to the traditional form of genres, I don't say Mammoth is there or quite as daring (few bands are, will be or is), but they still have that distinctiveness that makes them not a pure blues/doom rock/metal band, i think they should be viewed in the same light as exp metal bands that came in the same time as them, Isis, Pelican, Cult of Luna, Mastodon, are they less or more progressive then Isis or Mastodon between 99 and 01, do the albums progress more from album 1 to album/EP 2, towards album 3, is the band’s sound and progressive rock leaning larger or lesser then those bands mentioned above, i think this band needs to be looked into, as a whole rather than songs, sorry to sound wordy and stuff i just tries to make a case  I have used all my academic knowledge in this reasoning so,,,