After Derek Stepan and the New York Rangers put on one of their most impressive offensive displays of the season, all they could do was tout their defense, grit and hustle. Stepan scored twice, including a pretty coast-to-coast goal just after the Rangers killed a penalty, and New York beat the Florida Panthers 6-1 on Sunday night for as comprehensive-looking a win as New York has enjoyed all season. It came a night after the Rangers won in Buffalo, too.