Once again, substantial evidence puts Saints as Mountain level. I'll list my points with some quotes from the novels to prove them. Sorry for the incoming wall of text, but I want to put all my points and evidence in one place.
1st: Kanzaki Kaori can go toe to toe with Misah Kreutzev, who can flatten mountains. And yes, if you read the novels you'll see that Misha's normal attacks are described that way.
OT4 Chapter 3 Part 3:
Each wing was thoroughly infused with the Power of God, and each attack could flatten mountains and carve valleys like Divine Judgment. Even if it was on the battlefield as per normal, Kanzaki, who often caused enemies to back away in fear, was now stiff with tension. If it were anyone else, the killing intent released would have caused the person to faint.
2nd: Kanzaki Kaori is stated by his former friends and close companions of the Amakusa Church to have fought an evil dragon capable of swallowing up a mountain, presumably killing it.
OT7 Chapter 3 Part 1:
Do we need a reason? There's no reason from the beginning. This is how the Amakusa does things, especially for our generation. You're asking why our Priestess was able to be our leader at such a young age? In order to fulfill a child's wish, she dared to go against an evil dragon that can swallow a mountai. In order to fulfill the dying leader's wish, she was willing to protect a small village against thousands of enemies. Along the way, we were walking in her shadow. Although the time in which she led us was short, to us, it's eternal... Because of her, we're able to walk onto the path of righteousness; we're not being led astray, and we don't abuse our power. While it's easy to just say it, she taught this through action. She used her actions to show that humans can be strong and benevolent, that doing this isn't difficult.
Yes, given the lack of details on the fight this is not a valid determining factor
on its ow. But it supports Saints being Mountain level when you also have evidences number 1 and 3 to go with it.
3rd: More importantly, and the evidence you have ignored twice,
the calc that puts
Hel, a member of Gremlin, as Mountain level. Hel's attack was blocked by Silvia's magic and Saints are superior to most normal magicians, to the point "being capable of fighting a Saint directly" is a mark of strength for the most powerful magicians such as Knight Leader, Carissa, Elizard and Maiden of Versailles. It's one of the ways magicians are measured up both in-series and by fans for a reason. All Saints so far are more or less comparable to one another, so Silvia's feat can be applied to other Saints, proving the two aforementioned Mountain level statements.
4th: I've already explained how one of your initial pieces of evidence, the comparison of a Saint to nuclear weapons, makes much more sense in that Saints and nukes are both strategic assets that can decide a large conflict and a symbol of power for the organization that can claim to have them in their arsenal.
5th: Your argument of "Kanzaki used a sword and the wings were made of water" honestly doesn't make any sense to me because this is fiction and both characters are using magic. Kanzaki's sword is not a normal sword and Grabriel's ice wings are not just normal ice, so I see absolutely no reason for them not to be as powerful as the previous statements and calc make them out to be. You are the one who has to prove Gabriel's ice wings are that fragile when all signs indicate that it's not
6th: You may be confusing
Attack Potency with DC, they are not the same. A character doesn't necessarily require to bust a mountain to be mountain level, they can be mountain level for fighting and harming characters who are mountain level, which is the case here.
7th: The fact that Saints usually hold back their strength when fighting lower level characters should be obvious to anyone reading the novels. Brunhild liquified an artificial Valkyrie (who should be much tougher than a normal human) with a kick and is stated to be capable of bending a tanker in two with a single punch. Thor thought that a serious punch from Silvia would explode his arm. However, Kanzaki, Acqua of the Back and Silvia herself have been shown to be perfectly capable of holding back their physical strength so as to not kill humans with their blows, such as when Kanzaki stomped Touma (since she doesn't kill), when Acqua stomped Touma and the Amakusa (he wasn't trying to kill them) and when Silvia stomped Touma (since she wanted to pummel him and make him suffer before killing him). Thus is much more reasonable for Brunhild to hold back when fighting Mikoto than not. Also, once more, Mikoto could barely stop Brunhild's claymore for a second before Brunhild's strength proved too much for her, so Brunhild was obviously much stronger. NT6 Chapter 7 Part 7:
"That sword!!"
Brunhild Eiktobel was aiming for Mikoto's neck with her claymore, but the sword stopped in midair.
But once again it did not last even a second.
As if it was stuck in a wall and she was pulling it out, Brunhild ignored the great magnetic power and used her tremendous arm strength to forcibly swing the giant sword horizontally.
Fun fact, Mikoto can use magnetism to deflect a barrage from the Rush's gatling guns for at least several seconds before being overwhelmeld, so being capable of momentarily stopping one of Brunhild's casual strikes adds up. Which means Mikoto vs Brunhild doesn't disprove anything, and in fact, supports Saints being that strong.
Kamachi Mega-Crossover Chapter 4 Part 4:
"Ohhhhhhhhhhhh!?"
Misaka Mikoto gave an out-of-character shout.
As one of the seven Level 5s, she was known as the Railgun, Academy City's #3.
However, even her life was in danger when attacked by one of the colossal weapons that had ended the nuclear age.
She was up against the Rush, an Information Alliance Second-Generation Object.
Its main cannons were rapid-fire beam Gatling guns created by strapping together five barrels each. A single shot contained enough firepower to melt a warship into an orange puddle and it was accurately firing them at a rate of several thousand every minute.
Beam weapons were a military technology using electron beams.
That was good news for Mikoto who could control electricity. The barrage would normally have been unavoidable, but they bent "unnaturally" just before hitting and flew off in a different direction.
However, this was far from a perfect defense.
"Oh, crap!! This thing's more powerful than that #4! I'm going to be pushed back at this rate!!"
8th: Both Thor and Silvia are outright stated to hold back with their usual fighting styles, this is not something you can just ignore. You can try to kill an opponent and still be holding back your strength, just like a master martial artist can beat a child without actually making any significant effort.
I'm going to have to go to bed soon, but I think that I have made my point clear. IMO so far you have not presented any decent evidence to question Saints being Mountain level, since as I have explained the scene with Mikoto actually supports my argument. Your other point, Kanzaki fighting Gabriel not counting just because she uses a sword and its wings are made of ice, makes no sense to me.
