This should be the Leafs lineup going into the playoffs. Swap Marleau with Petan if you really want Marleau at centre, which you shouldn't IMO.
Johnsson-Matthews-Nylander
Hyman-Tavares-Marner
Moore-Kadri-Kapanen
Marleau-Petan-Ennis
Reilly-Dermott
Muzzin-Zaitsev
Gardiner-Hainsey