Aside from the fact that Hansung would've been on Yuri's rank (Top 500) if he hadn't been fucking around on the Floor of Tests, there's nothing more that could have any relationship with Cheonhee's standing afaik.
We have no way of knowing how strong that version of Hansung would be. Maybe he'd be far stronger than he is today, or maybe he'd remain relatively on the same level (which would mean Cheonhee is probably Top 500, and Yuri clearly above that). No way to know. Even if Cheonhee was Top 500 though, that doesn't necessarily make Yuri or Elpathion Top 300, because there's a massive chasm in-between.
It just means every legitimate Top 300 should be powerful enough to decisively defeat a force of this level, as they're Rankers that tend to be completely different from the ones below them.
Of course, this doesn't mean every Top 300 is equal, just that every legitimate Top 300 should be powerful enough to handle a force of this level.
Sharon could do all of that because Evankhell wasn't really trying. Once she stepped up a bit with Partial Release, Elpathion, her, and the rest of the available Corp were completely overwhelmed. Pretty much as if they were human beings standing in front of a natural disaster, there was absolutely nothing they could do. It's worth noting that Evankhell, even at that point, still wasn't close to unleashing her full power on them. We know she can summon up to 4 Orbs (she was only using 1), Decompress, and use the Primeval Flame.
And I don't see why Dokoko would be unable to defeat a leaderless Corp? Disregarding Evankhell's comment, his feats against Paul and Doom put him in a completely different realm than Division Commanders and the likes. His strength was hyped as that of someone who wouldn't be an easy match for a mature Slayer like Yama. He was also the main detonate that allowed White to reach his Prime (which is Corps Commander Level). While he's weaker than Corps Commanders, he's far from being a scrub compared to them.
Leaving aside the speculative Maschenny, this is actually not as far-fetched as I was imagining it to be. My scale is something like this:
Jinsung ~ Corps Commanders (Kalla, Yas, Lyborick) ~ Evankhell (Decompressed, Partial Release, Max Orbs and Primeval Flame) > Dokoko (fused with Final Phase Windbird) >> Nest Doom (Half-Transformation) ~ Nest Paul (Half Transformation) >> Dokoko (by himself) >> Nest Paul (Partial Transformation on Both Arms) > Elpathion > Division Commanders ~ Nest Paul (Base)
I think Yuri is probably at least comparable to Paul using Partial Transformation on Both Arms and at best as powerful as Dokoko by himself. Given her feats against Division Commanders, I hardly can put her any higher. She needs to get serious and use higher-end assets to easily trash them.
He stopped Evankhell for less than 10 seconds with his strongest skill and then got one-shot. At the Nest, he couldn't hope to handle a version of her that was far beneath her full power too.
Elpathion is very strong in the grand scheme of things, there's no denying it. He's just not Top 300, not even close.
