I'll give my thoughts on 4-B EQG villains.
No. The same thing I've said in the past, and I'll explain why, again.
- "Not to mention my previous arguments in this very thread. Needless to say, it is ludicrous to assume that the Elements of Harmony are 1.3200087e+31x weaker in The Human World (yes I actually did a calc on it) based on vague statement."
This is a non-argument. You are not actually proving the human world EoH are 4-B. You're just saying "they shouldn't be weaker than the Equestrian ones" based on nothing, especially since these Elements are from a world with exponentially less magic.
- "What could possibly lower the crown's power? The fact that it was in a world without magic? How does that make sense? It already has magic, so why would going to a world without magic weaken the innate magic already there? Does the world's magicless properties somehow drain the crown's magic? That's called speculation. No worse, that's straight up baseless assumption."
4-B Element of Magic on its own is also entirely baseless. The whole point of the Elements of Harmony is that their power comes from being together. If you're getting this from scaling to Alicorn Twilight, even 4-B Alicorn Twilight is, at this point, pretty shaky. Much of it comes from saying she "should" be comparable to the other Alicorns, without much of anything to back that up, and scaling to Starswirl's power from a book that as of now may or may not be canon. Even in said book, he's not exactly portrayed at that level.
This is on top of the fact that, as of recent events, Twilight herself has admitted her magic isn't comparable to Celestia, Luna, and Cadance's, while also being threatened by far lesser beings.
- "The Dazzlings were already a a threat to The Pillars to the point where they needed to be banished."
Dazzlings that have been starving for more than a thousand years and can't even fully transform into their true forms =/= Dazzlings in their prime.
- "And that was after absorbing the negativity of a random town."
First, town in a world filled with magic =/= school in a world with barely any magic. Second, you are assuming they literally only ever drained a single town, when they were supposed to have been a threat to Equestria, as a whole.
- "Why would the EoH be affected by a lack of magic when their power explicitly comes from the friendship between the girls and not the actual Elements themselves according to WoG? Something that was show once in both movies?"
You are even giving a reason as to why the two sets of Elements aren't the same thing in your argument to try and prove that they are.
Demon Sunset should scale to being unquantifiably above her pony self. That's it. Anything more delves into extreme speculation with very little to back it up, and the MLP ratings as they are now are already often based on heavy speculation.