By Rohan Nadkarni Inside the battle between a historic scorer and top-flight defense. Phoenix’s first trip to Dallas during its second-round series against the Mavericks was an eventful one. Before the team flew out last Thursday for Game 3, the Suns were grounded in Arizona for an hour due to storms in Dallas. The delay forced them to practice late in the evening upon arrival and scurry out of the bowels of Dallas’s downtown arena minutes before “The Who” took the stage that night. Things didn’t go much better the next day on the court. The Suns would lose Game 3—a game in which Chris Paul co…