User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-5078063-20121118153927/@comment-3146930-20121118163253

It isn't about who is better, it is about 7 demigods with the correct set of skills that together are able to possibly save the world. While Nico may be more powerful than Hazel, Hazel's ability to control metals has saved the group on multiple occasions and Nico is too much of a lone wolf to work well with a team.