He was nearly as strong as classic Thor back in the day and for some reason he hit as hard as Thor's hammer(despite the strength difference). Durability was somewhere on Thor's level too, but the gap seemed to be greater than the gap between their strength levels.
Depends on how far back you go. He picked up that ability sometime during the 90's if I'm not mistaken, but he didn't have it back when his strength was considered to be right up there with the big boys.
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I see your point there, considering Superman's high durability. However, with Magneto's shields as well as Simon's insane ionic durability, I don't see Superman doing much to him, either. And he can hit as hard as Simon can - at 99% light speed (Northstar's ability.)
Maybe not at first glance, but that's without taking into consideration the combination of Classic WM's strength and Magneto's ability to amp. If Mags can amp his "human level" strength to a sufficient enough degree to trade shots with Thor, just imagine what he could do with WM's strength as his "base".
Hal Jordan above classic Thor? I never really saw Hal in this light, but if the shoe fits.
Thinking about this amalgam I feel as if he could make it to 7 and stalemate... Magneto's powers are my deciding point, and as such could most likely strengthen his ionic body, and he would have the speed to operate very gracefully.
I don't know, how does this guy beats Diana? I mean, Wonderman and Northstar would give him power to hang with her for a while, but they would lose. Only Mags powers can help her, but she has the lasso.
Even if Magneto defeated Diana, Thor should just negate those powers, then probably lose to Wonderman Northstar.