Others have tried to phase his shields.
Its never pretty.
And the helmet does nothing for telepathic protection.
Its his will and the fact that the electromagnetic energy that surrounds him messes with the tp.
And for someone who likely sees energy auras, the invisibility thing isn't a sure bet. But the villains do lose.
"MM has a lot of iron in his blood" is that from that comic where Dr Polaris held still the entire Big 7(I don't remember was Aquaman there?) with his Magnetic Powers in that JLA comic? They then had to send plastic man to win the fight?
I'd actually love to see this fight in a comic book, Cassandra Nova, Nimrod, Vulcan etc vs the JLA, great fight.(Just as long as we leave out the cosmic hierachy from both sides)
the simple thing to do is look at everyone as an individual, their high feats and their low feats , and strengths and weaknesses. and then look at them as teamates.
looking at it that, I belive the villians would win .
I try not to look at it as if Marvel chareters came to the DC universe (because we all know DC loves to outragously overpower their chareters and marvel likes to make their's more street, and thats why Marvel has such a distiction between regular heros and cosmic level superheros, and DC does not) , but as what if all the chareters came from the same place.