My healthy line up in the short term.
Skinner Thompson Tuch
Benson Cozens Peterka
Quinn Mitts Olaf
The 4th line is a big question. Right now you have too many left wingers and not enough right, when healthy. KO is the right side, but he needs to go on the Anderson plan. Rosen is not really a 4th line type at the moment. Your looking at Greenway, Robinson, and Girgensons for the 1 leftwing spot. Maybe Robinson was an elaborate rental plan who ends up right back In Columbus. There could be some other swap for a 4th line right winger trading away one of the lefts.
I would not break up the Cozens line right now they are going too well and expect scoring more scoring shortly.