As I mention in the OP, she uses close combat with the aid of her Lamila and ranged energy attacks mainly. She also uses teleporting to avoid attacks or shields to block/reflect them, invisibility to get the jump on her opponent. Other than that, most of her other hax is out of character.
Alright.
Can you elaborate on what a lamila is?
AP appears to be Will's "much stronger than" 719 tons (based on the 2x hurricane KE) vs Mori's 112 tons (from his dragon catcher calc), which is above a 6.4x AP advantage for Will, not looking good for Mori. He can amp himself 8x with Jeahbongchim to hit 899 tons, but that'll put him just beyond even footing.
Will would have higher speed but it's equalised, which means Mori isn't allowed to win via Jeahbongchim speed amps. He still has techniques like Bo-Bup, which is effectively not-magical Instant Transmission that he can use to blitz characters on the same level of speed as he is, so that's a very valuable asset to him (if he's allowed to use it). He has passive fearhax (scales to someone who made an entire arena of people metaphorically piss their pants) which usually works on opponents weaker than him, not sure if that'd apply here.
Invisibility and teleportation are pretty much the only thing you've mentioned I see giving Mori a run for his money, since his extrasensory perception is pretty much just "seeing but far". He's dealt with shield and sword users before with little to no trouble AFTER tanking an explosion big enough to light up a warehouse point-blank and then fighting off a small army of clones from a guy comparable to him in strength. His stamina and pain tolerance are
incredibly high, he's a literal walking tank and pretty much won't stop fighting until he actually gets knocked out. He can also use his Jeahbongchim to
completely nullify any pain he receives for 2 hours, so that's important because it makes him even more tanky. Jeahbongchim x8 also amps his dura to the same value as his AP.
He has information analysis good enough to see a person's weakpoints just from
looking at them and analytical prediction that lets him know where someone is and how their body's positioned just from making physical contact while
his balance is off and his brain is shaking, so when he's not so off his game it's likely even more potent. They both have similar range (Will's tens of meters vs Mori's dozens of meters) so neither can get out of range and spam from a distance.
I don't have the scan on me rn but I know there's a point where Mori tells someone he's fighting that it's flat out better to dodge his blows rather than block them because he has a spammable technique (Homi Geol-Yi) that can open up blocks, so this just reinforces that going H2H will put Will at a massive disadvantage.
I think Mori starts with checking out his opponent, and if he decides they're strong (which he will immediately deduce just from looking at Will) he's absolutely not opposed to going x8 right off the bat and just attempting to mollywhop them. Like I said before, Invisibility+Teleportation will give Mori trouble since he doesn't have the senses to counter it, but if she doesn't start with it and goes straight for H2H combat then Mori is almost bound to come out on top, with his incredibly slight (1.25x) AP advantage when amped by x8 (+ dura neg with certain attacks where he could shake her brain and throw her balance completely off) and his
immense H2H skill (as well as being able to just straight up paralyze or death-hax Will with his Bongchim-Nah style though I don't think he does the latter IC) + being able to copy and adapt to Will's fighting style AND RE+AD if the fight drags on means he will come out on top more.
I'm new to the forums, I don't know how to summon people more knowledgeable on GoH than I am. I've read the series, but it was a couple months ago so it's not particularly fresh in my mind (i.e I could be wrong about some info). Could you call some supporters for both verses to get more arguments?