Which version?
Heather with her geothermic powers?
Mac with his electromagnetic powers?
Heather with her electromagnetic powers?
Mac and Heather in Hulk-buster armor?
What version is Iron Man's armour?
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Basically is it Mac or Heather and is it current versions of them? Since Mac can think as fast as a computer now. Way faster than a normal human.
His thor buster armor would own this fight easily, not to mention it looks cool
http://www.advancediron.com/armory/thorbuster.php