In 108 even strength minutes so far this season, RNH has 0 pts.
This on the heels of last season when he managed only 2G and 11A in 624 ES minutes.
Over that period (last season plus this season to date), he has lower ES productivity (as measured by goals or points) than Arco, Gagner, or Gordon (or, for that matter, Hall, Eberle, Hemsky, Perron, Yakupov, or Smyth).
At even strength, he is scoring about 3 goals and 18 assists per full season (80 games of ES 15 minutes).
I would guess that is among the worst ES productivity of any top 2 C in the league.
When Gagner returns, unless things have changed signficantly by then, I would be inclined to have Gagner on the top line (ES).