Can't she just transmute him? Sure he's faster and stronger than her but she can shield herself for a moment or two then transmute him into a duck or something.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.
I will say Sersi for now, but Captain Atom can give her hell. Sersi can fight for a long time without getting tired. Both can absorb energy, both can reform, both can increase physical abilities, but Sersi does have mental powers that can come into play, but Atom full potential is ridiculously high. But I still say Sersi for now!
Does he have other matter manip resistance feats or just that? Reason being, it could have been a fluke.
Don't see why she can't. She's done crazier things. Like that one time she transmuted Vision into dozens of little Visions and they each had their own mind. It happened in an Avengers issue, right before she went all insane and stuff.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.