And for the Mergequake, I’d wholeheartedly agree since the context is itself is just insufficient; regarding “destroying everything” as destroying the entire cosmology itself just seems to be an extrapolation. Thus, wouldn’t be an outlier nonetheless?
The reason they should scale to 2-C is because Mergequake is a place where two Realms merge.
Ok so... (Time for a yapfest)....here's a map of how the Multiverse (more like the entire cosmo) looks like rn:
Link if u can't see media from VSBW:
Here
So, The whole plot of the Ninjago: Dragons Rising Season 1 is about Ninjas trying to stop the Realms to occupy the same space, or, simply, merge, which the narrative supports. Now back to explanation
We know by default the Ninjago Realm as
a whole was indeed affected by the Merge, but not in the same way as the other Realms. We do know however:
However,
its implied multiple times that the Monsters we saw coming out from the action of 2 Realms trying to merge in DR S1 EP 5 came from a
DIFFERENT DIMENSION. This would indicate that those monster
are from a Realm's Space-Time seperate from the Merged Realm, a space-time who was part of the Realms (as remember Mergequakes only affects the Realms).
We also see in the sky
only 2 Moons, the one from Ninjago and another one from the Wyldness (which was
shown many times btw). However, this is where we can see why the other space-times didn't fully Merge. Many of the other Realms have shown to have their own Celestial Bodies before the Merge:
However, after the Merge, we only see
1 Sun and 2 Moons around the skies of the Merged Realms. This imply that
only some specific locations from each of the
OTHER Realms were actually affected by Merge, which makes perfect sense using the dimension scans shown earlier (Fun fact: the term "Dimension"
was also used to describe the Ninjago Realm, who is a space-time continuum). This is represented by the blue bubbles outside of the Merged Realm in the map
Now, we got the Space Bubbles from within the Ethereal Divide which
was stated to be a Realm which would indicate its a space-time of its own (As the term "Realm" is gerenally associated with
space-time continuum [like with the Ninjago Realm] ). This is what was said about Space Bubbles in DR S1 EP 17:
Prentis: There! We've ported them off to wake up in the lands formerly known as the Cursed Realm, which is where they're originally from. Probably.
Arin: Excuse me? What is this place?
Prentis: Department of Reassignment. We deal with interstitial space bubbles.
Arin: Space bubbles?
Prentis: A form of stasis. During the Merge, some people were shuffled into pockets of the Nothing Space between what used to be the realms.
Arin: And you find these people?
Prentis: Not on purpose. But when teleporting, Administration Agents sometimes bump into pockets of these Nothing Space Merge refugees. It becomes our department's job to send them back where they originally came from.
Arin: How do you know where they came from?
Prentis: Well, best guesses. It's all fine, probably. We keep records. (He sends Awakened Warriors through the portal.) Off to Cloud Kingdom, which is probably, almost definitely, their home. Okay, that finishes up that bubble.
This basically tells us the ED in fact
significally affected by the Merge, as
multiple MergeQuakes (at the time) were affecting the ED and ended up sending sum people inside, and at the same time the entire Ninjago Realm was being affected by that event. This also means the Merge as affected at least
2 space-time continuums, 1 being Ninjago, and the other one being the ED. This is further backed up by
a statement confirming Ninjago was affected. And
we also have this statement saying the Merged synced up time, which means we can argue it affected even the Realms,
but didn't necesserally merged all the space-time, as syncing time just implies their flow of time didn't merge, but started to flow at the same pace
The MergeQuakes would thus occur for the parts of the
other Realms who haven't merge yet, especially their space-times and Celestial Bodies, to go on and merge with Ninjago. This would lead us to a 2-C ranking for the MergeQuakes, Zane statements about the tipping point won't matter here, because this is linked to a
WHOLE DIFFERENT event called the MergeQuake Storm, which involves a annahilation of the Realms. Also,
that huge jump in power is explaned by the Ninjas regaining TP before DR which massively upscales their stats
I'll add more to it if I find something I've missed