Yes, there is. There is the fact that his heart is demonstrably different from the rest of his body, and the fact that it was stated that destroying his heart was necessary to defeat him.
Can you link the page where it was stated that destroying his heart was necessary to defeat him? While you're at it, please link the page where his heart was stated to be different than his body.
"And once again, if he could regenerate even his heart, he would need to have a higher tier of Regenerationn than what is stated in his profile"
You don't need Low-High Regenerationn to regenerate your heart so what's your point?
and it would imply most arcane stage mages do not stand a chance against him, which is demonstrably false, because it was stated mages like Yami can destroy devils, and we even saw Yami directly hurt the devil, despite his lack of regen negation. So much so, it was implied that if Yami had destroyed the heart with Dimensional Slash, the fight would have been over.
Listen. First, just because he can regenerate his heart doesn't mean he can't be defeated. Second, Yami only harmed Zagred because he had the AP to do so, that has nothing to do with him being arcane. Also: "Yami directly hurt the devil, despite his lack of regen negation", you know that what you're saying makes no sense, right? Being able to regenerate doesn't make you unable to be hurt.
Ba was hurt by multiple attacks yet he could still regenerate.
Yes, they did say it, Loropechika explicitly stated this when she was explaining what arcane stage magic is and why it is important. I've debunked the claim that arcane stage magic simply means "being effective against devils' elsewhere, especially because Loropechika also stated stage 0 and stage 1 mages can fight relatively well against devils, which would be impossible if spells were ineffective against them. The defining feature of arcane stage is being able to finish them off, as Loropechika explained. So, no, merely affecting a devil does not make one arcane. Besides, by that argument, Licht and Lumiere would have to be arcane, which has never been stated.
By your own argument, he is arcane, especially since he can defy the laws of nature and can affect and kill other demons, in his own verse. Also, in Black Clover, it has been stated that if your magic is affected by forbidden magic, then it makes you arcane. That is actually the reason Loropechika gave for stating that Nero/Secré is arcane, even though she is otherwise stage 6.
This is what she said: "You are able to manifest things like chain and steel, use unnatural magic, even magic that manipulates space. And from those kinds of magic, people who
hold the potential to kill a demon came to be."
Assuming she was indeed referring to arcane mages, that means they can kill a demon thanks to their hax and not strength alone. Secré can seal souls with forbidden magic, Asta has Causality Manip, Vanessa manipulates Fate, Yami has Dura Negation, William has absorption and Julius has Time Manip. Chandler doesn't even have similar abilities to consider him an arcane (Except Reality Warping which he only uses to bring night, and Death Manipulation which won't work on Zagred like I said earlier). Kill a demon with strength alone doesn't make Chandler arcane (you said it yourself when you said Lumi├¿re wasn't arcane: He can kill a demon with power alone but doesn't have hax), and just because he can kill a demon on his own verse (Which is most likely weaker than him) doesn't mean he can kill a demon in the BC verse. That's like saying Tanjiro could kill Zagred because he can kill demons in his verse
"And saying Grey cannot kill Dante is devoid of logic. Transformation magic allows her to change the properties of magic spells and objects, there is nothing that prohibits her from transforming other magic into arcane magic. She lacks the skill to plausibly fight well against Dante, but that does not affect her implied ability to finish a devil off. Also, Dante is not a devil, he is merely devil-possessed. I don't know everyone gets those two things confused. What, so Asta himself is a devil? That's absolute ridiculous. That's more ridiculous than claiming Grey can defeat Dante. It really is."
I'm arguing with someone saying that current Grey can defeat Dante so I won't waste my time here. Even if you talk about her latent abilities, you're just falling into assumptions since she never did nor displayed the ability to do so.
That's just false. There is not a thing that Asta can do that Absolute Cancel cannot do.
I don't know, can Absolute Cancel negate reincarnation? Can Absolute Cancel negate curses? Can Absolute Cancel negate magic by severing the cause and effect relationship? Also you skipped the part where I asked you to show Absolute Cancel negating High-Mid+ Regenerationn.
The idea that Vanica is not arcane is thus entirely absurd, and not an idea you can convince me of unless they state she is not arcane.
She's Stage 0: https://v217.**********.com/manga/Black-Clover/0240-003.png
"And if they ever did state she is not, I would take that as a lack of consistent writing on Tabata's part."
Now this is ridiculous, Tabata never even said she was Arcane neither that using demonic powers makes you arcane so stop with the fallacy.
The only part of this wall of text that actually Matters
ANYWAYS, all I was saying since the beginning was that he should be able to regenerate his heart but you misinterpreted it and made me say things I clearly didn't.
Even if he can't regenerate his heart, Zagred is more intelligent, more versatile, has better regen as well as Type 2 immortality, possession, corruption, and dealt with someone using a better powernull (And before you try to debate it, that's doesn't matter anyway because Zagred can create matter).
What are Chandler's wincons? Him eating his soul (correct), destroying Zagred's Heart (Which was unscathed after an attack that outclasses Chandler's AP? Not sure...) and neg his regen with Absolute Cancel (Has he ever nullified High-Mid regen, let alone any regen at all, with this spell?)
I don't see how Zagred loses, even inconclusive seems unlikely.
Also please, make shorter posts next time