User blog comment:IamJakuhoRaikoben/Chapter 402: Iron Fist of the Fire Dragon, Review./@comment-24039250-20140929153844

Natsu doing good against Mard to me isn't really Nakama Power, but is simply type advantage....that and I think Mard was off guard underestimating Natsu and taken aback from the "I'm Igneels son" comment. Mard uses plants+Natsu uses fire=Advantage Natsu.