This only hurts your argument. Because if Cat doesn't destroy Mjolnir, he will be at a severe disadvantage.
Because why? Thor is still in danger if he goes for CQC with Cataclysm up. & Thor doesn't seem the sort to evade & spam range, & Cat Noir would probably attempt to close the distance anyway.
Mjolnir will always return to Thor's hand, unlike Cat's staff, and Thor can fly with it.
Cat Noir having higher Lifting Strength says Thor grabs Cat Noir's Staff, & Cat Noir swings Thor to the ground with him on it (He's the one holding it to begin with.). Not to mention, Cat Noir getting on his staff while it extends as a means of travel is not uncommon; If Thor tried to fly away with it, Cat Noir could just have it keep extending, or retract it out of Thor's hands.
1. Speed is equalized. This point is moot. 5 minutes to them even at their speeds would not take away the imminent danger of transforming back into a civilian from Cat.
(Ignoring that there's almost certainly time in the fight before Cat Noir uses his Cataclysm....) I don't understand your point here.
The slowest travel speed in this is Thor's 29.53 m/s
The slowest reaction speed is reacting to an Akuma, for which a relevant calc placed them at
611.229166667 m/s (Though, I have my issues with this basis of scaling.)
For the specific keys involved, the combat speeds listed are:
Thor:
Massively Hypersonic combat & reaction speed
Cat Noir:
Hypersonic with
FTL combat and reaction speed.
So I'm a little confused; Which of those speeds being equalized to makes 5 minutes a small amount of time, & why? Even using that Travel Speed for their Combat Speed, I'd assume they'd probably be trading several blows a second, at least.
2. This is fine for the first 10 seconds when it matters before Thor realises this and doesn't go for grappling.
& what does Thor do then? Then it's melee, & we've discussed how this goes; Thor unknowingly at risk (He can probably tell the hand is dangerous, but not necessarily what it does.) of death or near to it if he touches Cat's Cataclysm hand -if that happens then- & if Cat Noir DOESN'T use Cataclysm, he has the Stamina advantage. Not to mention the range advantage due to a staff vs a hammer, the former of which can extend.
3. Moot. Cat still only has 5 minutes.
5 minutes AFTER using Cataclysm, whenever that is. Until then, Thor's advantages via still having Mjolnir are what, flight & electricity manipulation? Abusing those to stay out of range doesn't seem IC for him. & that's assuming Cat Noir doesn't just dodge or block with his staff to deal with Mjolnir at range; Fighting unusual opponents is normal for him.
4. Fair. But Thor can still grab the staff and slam Cat into the ground. Cat may have the greater LS, but he still weighs as much as a teenager.
Even if Cat Noir couldn't use his leverage to overturn this -Higher LS & he's the one holding it in the first place- Acrobatics, Cat Noir regularly using his staffs for flips, pole-vaults, hanging/clinging or hanging on it.... Not to mention, he's trained in fencing, so I doubt Thor would have an easy time grabbing it anyway.
5. Thor has thousands of years of experience fighting vastly stranger foes than Cat. Also, he fought Hulk, who did nothing but fight and train for 2 years straight.
Yes, but fighting opponents who are stronger doesn't mean you are a more skilled fighter. That experience could be of him having the statistical advantage, or the stamina advantage, etc.
Without knowing the details of how & what he fought, it doesn't tell us much, & how is that reflected in his fighting style anyway?
& does Thor have or show any proper weapon training?
6. Cat is the better acrobat, but jumping around won't win him this fight.
I'd imagine maneuverability is valuable in a fight, even with speed equalization. Being able to dodge, especially if you have to do so at odd angles, or being able to jump onto or above nearby fixtures, etc.
7. Jumping onto buildings is the bare minimum Thor can do. This is disregarding the fact that Thor can just ram through buildings.
Both for jumping onto buildings, & for ramming through them, is there evidence Hammerless Thor can do so? (In the latter case, having AP does not necessarily equal having that level of environmental destruction, IIRC.)
& even if Thor does match him in a chase, I don't think it would guarantee Thor finds him; Having to detransform & hide (Often to conceal their identity.) happens frequently for Ladybug & Cat Noir.
Between trees, shrubbery, numerous buildings, bedrooms, trash cans, dumpsters, & probably other places, there would be a lot of locations Cat Noir could likely avoid detection in.