What OP said makes sense—I agree.
Care to elaborate?
I'll be back in a few days. Because honestly this crt looks promising.
Ok, I also need time to research some stuff and prepare more arguments.
And I think I already found something interesting:
"
Before the dawn of time and the formation of the multiverse, there was nothing but the magical Prim, the primordial soup of creation that stretched across all existence like a chaotic sea. This was the case until Gan, the Spirit of the Dark Tower, emerged from the formless Prim and gave birth to the entire multiverse. As Gan slowly expanded, the Prim receded into nothingness. Soon all that remained of the Prim were assorted demons stranded on Gan's earth who once called the Prim their home.
- The Dark Tower - End-World Almanac 01 (2008)"
Facts:
1) "there was nothing but the magical Prim" - Todash space is not necessary bigger than the Prim. The Prim was everywhere before the creation of the multiverse.
2) "Gan emerged" and "Gan slowly expanded" - these 2 facts can be counted as anti-feats for Gan (and I mean true Gan, because Gan and the Tower are 2 different things here.), because a proper tier 0 character should be changeless:
Tier 0 (Boundless):
Entities who are completely transcendent over any and all forms of hierarchical extension. More specifically: They not only encompass the collection of all possible "qualities" represented by
High 1-A+, but also exceed it utterly, existing beyond any and all distinctions between ontologies and any division between objects.
They are beyond differentiation, changeless, indivisible, ineffable, self-sufficient and completely unsurpassable. See
this page for more information on both this tier and the preceding one.
3) Gan is made of the Prim. He is not the very first and the very fundamental source of everything.
4) Dark Tower verse cannot reach High 1-A+ level, because the Prim and the multiverse cannot exist at the same "time". A long time ago we had the Prim only. But now we have the multiverse and todash space (empty void between universes and outside the multiverse).
"
Although the Dark Tower appears to be constructed from gray stone, legend has it that this stone is actually hardened flesh, and that the Tower, Beams, and roses are but one living, self-sustaining entity. Just as the Tower is believed to be the body of Gan, the first being to rise out of the primordial Prim, so the roses and Beams are believed to be a living, singing force field that emanates from his body.
- The Dark Tower - End-World Almanac 01 (2008)"
^ According to it, the Tower is Gan's body. True Gan doesn't have R>F transcendence over it.
Right now, there are 2, only 2, scans about the Final Others' nature. One of them being an author of everything, and another of it containing things as mote's in its mind. I can not give Tier 0 off of those two scans of superiority alone.
Gan has R>F transcendence over the Macroverse. But Macroverse is only a part of the Tower. The Tower itself has a ton of different levels of existence and higher dimensions. The Macroverse exists somewhere there.
The destruction of the Tower would also destroy the Macroverse:
THUNDERCLAP
In Wizard and Glass we learn that the fey realm of Thunderclap sits on the lip of END-WORLD. In Wolves of the Calla, we discover that the dark land of Thunderclap sits just east of the BORDERLANDS, which in turn sit on the eastern edge of MID-WORLD-that was. Thunderclap is the home of the DEVAR-TOI, or Big Prison, where the CRIMSON KING keeps the psychic BREAKERS. The Breakers (who are human) are forced to use their wild talents to erode the BEAMS so that the foundering DARK TOWER will collapse, causing the macroverse to blink out of existence. - The Dark Tower Glossary
EDIT: Day 2, I found some extra info that may be useful for the discussion.
From The Dark Tower - Guide to Gilead (2009) (Digital):
1)
Gan has a wife, a character who stays in the same weight category, we may say.
2) Another source confirms, that "
In the beginning there was only the Prim". So the Prim was older and more fundamental than Gan.
3)
Minds of people are a well-protected source. Even the Crimson King cannot enter it so easily. (An anti-feat for the Crimson King).
4)
Another source says, that the Old Ones/the Imperium made mechanical Guardians. And this fact shows once more, that the Guardians are not big players in the verse. They are fodder, so there is no need to powerscale Gan from them, it is useless.
Also, "On his shell he holds the earth" is not an impressive feat for a character, who borrows the "High-1A" tier at this moment.
From The Dark Tower - Gunslinger's Guidebook (2007) (digital):
1) The "
beams with technological replicas" have been mentioned once more.
2)
The Crimson King wants to destroy the Tower, and
it was mentioned in this source, too.
3a) "
In the beginning, there was nothing but the Prim, the primordial force of chaotic magic which ate away at the nothingness in the universe"
3b) "
Gan, the spirit of the Dark Tower, was the first to erupt from the Prim" - so Gan was just the biggest fish of the Prim.
3c) "...
the demon-infested Prim began to recede" - another confirmation that even the Prim itself is not changeless.