Lots of options on both wings. Imo, Marner, Nylander and Hyman will definitely be there next year. The other 5 wingers will be decided from a group that includes Johnsson, Kapanen, Mikheyev, Clifford, Spezza, Engvall, Malgin, Barabanov and Robertson. Long shots include Agostino, Korshkov and Petan.
One from that group could replace Gauthier at 4th line center. If not, I see Hyman, Johnsson, Engvall, and Robertson on the left side; and Marner, Nylander, Kapanen and Barabanov on the right side.
Imo, Agostino, korshkov and Petan are signed and will likely stay with the Marlies.
That leaves Malgin, Clifford, Spezza, and Mikheyev. Imo, Micheyev and one other will be resigned. Clifford is an UFA so hell likely have more offers than RFA Malgin, so I'm thinking Spezza or Malgin will be the other winger that will be resigned.
Personally, I don't think Malgin provides much more than Agostino or Petan. Spezza, on the other hand, has years of experience and can also play center.