Apologies for the delay, right when I was about to create my suggested justifications yesterday, we had a power outage in my area. Anyways,
here's the sandbox.
I made sure everything was properly cited and added some missing scans, as well as a couple new ones to Mephisto's justification that I don't think would be too controversial. I rephrased things a bit as well, and removed feats of mentions of other Hell-Lords feats, rather keeping them on their respective character's justifications. The wiki also currently accepts
this scan to say all Hell-Lords can fight evenly in wars with one another, which seems a bit weird since there's no mention of these wars being remotely even. The fact it's off-screen is also a bit of an issue, as Hell-Lords are known to be cunning, so how the fights actually went is a bit hard to say. I left it as supporting evidence in two justifications, but removed mention of these wars being even.
We also could add Galactus
being capable of devouring Mephisto's realm to his
High 1-B justification.
Edit: I just remembered
Hellstorm has a feat of holding back all of Hell alongside Dr. Strange in Venom #13.4, so I could add that later too.