Let's begin by explaining that Information is the Fundamental Building Blocks of

Reality that make up all aspects in TenSura

That includes Dual states of Existence

and Non-Existence

Negative Energy of the Forbidden Void

Though, even though information particles make up everything, it doesn't mean

Timeline

Now the Tensura verse doesn't have an infinite number of worlds (Universe) but it
has an infinite number of timelines.

As each World (Universes) as its own Time Flow, it also has its own cycle of time,
producing what is known as an endless timeline loop. A timeline is a Parallel
World. There are no Parallel Worlds

but there are multiple Parallel Timelines, as shown that the World is branching.

Each Plane Of Existence [World] has many Parallel Universes[Timelines]

There are many Cycles[Timelines] of a World.

In fact, a World in all its totality has an Infinite amount of cycles.

These cycles have different Axis of time

Meaning, they do not share a singe time axis, but rather, they are their own Space-
Time Continuums. That is to say, if looking at a World through all of its Time, it
would have an Infinite amount of cycles.

Each World has this Infinite Cycle of beginning and End.

and multiple of the same Individuals can't exist in the same timeline at the same
time.

So to conclude, the World in Tensura in all its totality, as the whole Space-Time
Continuum, is 2-A (Multiversal+ level), containing an Infinite amount of cycles
that are each Low 2-C (Universal+ level), and are their own Space-Time.

Dimensions

Dimensions are also Space-Time Continuums with their own Time Axis.

There are many different Dimensions

So many in fact that Zalario by himself had destroyed many.

These Dimensions are also known as Spiritual Realms

So vast that they themselves contain multitudes of Worlds. A single Dimension can
contain at least three worlds

With some even containing So Many, Numerous, and even Countless.

Dimensions are unequal in size

Some Dimensions contain Worlds

While some contain other Dimensions themselves

While in some Dimensions, these inner Dimensions contain even more Inner
Dimensions.

Similarly, these Dimensions have a "Strange Space" between the Worlds that they
contain

This space is unbounded by time itself.

This means that these is the Space along a 5th Dimensional Axis between Universes.
This space however, unlike most other cases, is not insignificant, in fact, it is
Infinite, as implied that Velgrynd was drifting there without any sense of time,
and would have died if not for her Infinite Lifespan as a True Dragon
Meaning she would have been drifting in the Infinite expanse for Eternity. Eternity
here means infinite time

This means a Dimension can possibly contain an Infinite amount of Worlds.

as they have their own Time Axis.

Furthermore, as a Dimension and Worlds in it have their own Time Axis, than as
explained before, a Dimension would be qualitatively superior to a World. Meaning
that a dimension will be Low 1-C 6D (Low Complex Multiversal).

Labyrinth

We should know that each Floor of the Labyrinth is a Dimension of it's own

And there are different Dimensional Levels in the Labyrinth. A hierarchy is present
as wel

Which is implied several times throughout the series

it's even stated to be a "Dimensional Level", which backs up the possibility even
more that there's a Higher Dimensional Hierarchy. Furthermore, it is also implied
that the number of floors it can contain is not just a hundred floors, but
Infinite, and the hundred limit cap is merely due to Ramiris's lack of magicules
and time limitations

However, this does not change the fact that the Labyrinth can indeed contain
Infinite floors. Ramiris can extend and contract the Floors to any size she wishes,
even to an Infinite Size.

Furthermore, it is shown that Veldora was unable to destroy more one or two floors
even if he cracked up all of his magicules, and couldn't destroy multiple floors at
once

Despite Veldora being a True Dragon which is the pinnacle of the Tesura verse that
can destroy multiple weak universes with his aura.

This shows that even a single floor is hard to destroy for a True Dragon, despite
his statistics of being able to destroy multiple universes, which means that a
single floor must be of an equivalent tier to be able to give Veldora a difficulty
in destroying it. Since we know that, as per qualitative superiority, a higher
being can destroy a lower dimensional structure without much effort whatsoever, it
means that the first floor is at the same level of Dimensionality as Veldora.

Furthermore, the fact that Veldora couldn't destroy more than 1 or 2, shows that
the Dimensionality does increase as the floors go up. In summary, each floor is
High 1B (High Hyperversal Level), possibly Low 1A (Low Outerversal level) due to
giving Veldora "difficulty" in destroying it despite being a Beyond-Dimensional
Lifeform (I'll explain later why True Dragons are so).
So, as we have discussed above, there are an Infinite amount of floors, with each
floor being superior to the one below, to the point that Veldora couldn't destroy
more than 1 floor, and even that was with difficulty. Thus, the floors in total, or
say, the highest floor being able to be contained inside the Labyrinth would be
High 1B, and the Labyrinth itself would be layers into Low 1A because of the
superiority it has over the floors within it.

Cardinal World

Cardinal World, also known as the Central World, is the World where most of the
events in the TenSura Light Novel take place. It is a World specially created by
Veldanava to be stronger than any other World, which is the reason why, even after
countless feats between True Dragon and higher level monsters and individuals, it
was not destroyed.

The main Universe [timeline] in the Cardinal World. It is also the "Base World",
the outside of the Labyrinth.

The Cardinal Universe has a Dimensional Difference over the Labyrinth

A difference in Dimensionality between the Cardinal World and the Labyrinth

in which it is the "Real World"

and Labyrinth is Imaginary.

However, this is not a simple "Dimensional Difference", as to the Cardinal

From what I explained at the beginning, we all know that Information Particle is
something that is at the heart of all matter, and everything in creation. One of
its characteristics is that, it is Transdual. This means that the Cardinal Universe
is seeing the Labyrinth as Fictional, not as a simple R>F, but as truly
Qualitatively Superior. Heck, even Feldway, whose strength was more than the
combined Milim and Velzard, was only able to destroy the Cardinal World's main
Universe

Which goes to show just what kind of superior standing it holds to everything below
it. So the Cardinal Universe is beyond the Labyrinth, and is higher into 1A
(Outerversal level).

Rimuru Tempest

Now to explain why Rimuru is High Outerversal. Rimuru has an inexhaustible amount
of Turn Null Energy

Through this energy, Rimuru can recreate The World, the Entirety of TenSura
Cosmology, including the Cardinal World, and the Infinite sized Dimensions and the
Labyrinth.
He can do this tens of thousands of times.

Imaginary Space is a power that even the “god" of Tensura doesn't have

and it can fit all of worlds along with its dimensions and timelines and still not
be filled, implying that it is of a greater Infinity than the World. Meaning that
it has a dimensional superiority than the world making it High 1A (High Outerversal
level).

And that's that. Rimuru is now High 1A in the light novel. I didn't scale the
entire cosmology since I didn't add the Promise Land. I didn't add this because we
have little information about it except for every there seeing the world as
fiction. If added, this can increase Rimuru's scaling.