Because Nagasu, Flatt, and pewter-medalist Caroline Zhang were too young to compete at an ISU Senior Championship event, Wagner was the only medal winner to be named to the Four Continents and World Championships teams. At the 2008 Four Continents in Goyang, South Korea, Wagner finished twelfth in the short program, fifth in the free skate, and eighth overall.
A pair of hard falls during the free skate injured her left hip (hip pointer) and bruised her right knee but she was able to complete the program and finished fourth in the segment. Championships, Wagner placed first in the short program, second in the free skate after falling twice and two-footing her salchow jump, and was able to edge out Gracie Gold to win her second straight national title. With these placements, they gained three spots for the Olympics and World Championships.Wagner began the 2011–12 season at the 2011 Skate Canada International. She was first in the free program and won her first national title. At Four Continents, she placed second in the short program after two-footing a planned triple flip-triple toe combination and successfully landing her triple loop and double axel.She placed second in the short program and third in the freeskate to win the bronze medal overall. She placed first in a free skate which included six triples and won the gold medal ahead of two time world champion Mao Asada.Wagner moved up to the senior level both nationally and internationally for the 2007–08 season.She made her senior international debut at the 2007 Skate Canada International in Quebec City, Quebec, where she placed fifth overall.