Well, yes. You'd have to give AM the credit for doing dozens of things in perfect sequence within the fight in response to Supes to have a chance. Otherwise, a full-power attack at full speed from the Man would be the end here.
I assume you didn't include 4th wall style powers, yes? That would've changed things a bit.
Still, I remember this fight. It got people seriously thinking about the character, which was cool. I don't think half the stuff you and DC threw out was justified with feats of any kind, which makes it iffy, but he'd be a tough out when written well.
Are you kidding, none of it was. Well, the strength thing was. He took the mass of a blue whale and added the ability to lift hundreds of times his own weight. He said "With this combo I'm the strongest being on earth". But yeah, this was pre tourney hype I believe. I'm the one who got the forum to take Strange seriously, too. I got to the amalgalm finals with one character.
And he gains the abilities of animal *species*, not specific animals.
In other words, I'm pretty sure copying Mutants would get him the powers ever Mutant has in common. Think about that for a moment.
He can copy humans I'm pretty sure, it's just that's his default powerset so it doesn't matter, i.e. he is a human. He cannot copy specific Metahumans.
Remember, debate the character, not a vaguely-similar-projection-to-what-the-character's-powers-SOUND-like.