Honestly I don't know who I'd tell Nick to watch. Obviously Marty is a HHOF level talent, but I'm not 100% sure if that's the player I'd get him to watch. I think honestly the player I'd get him to watch the most would be Brendan Gallagher. They have an eerily similar skating stride, but Brendan has found a way to be effective below the dots, where Nick really struggles. Nick's offensive upside is higher IMO, and to be truthful I don't think he really needs to work all that much on that aspect of his game. I'd just show him film of BG working on the walls, and how he protects the puck. They are identical Heights and builds almost. Or at least will be when Nick fills out. I don't see any reason why Nick can't battle the way Brendan does. Nick losing battles has never been for a lack of effort, It's always been about not utilizing his low centre of gravity to his advantage. Something Brendan does very well IMO. If he can figure that out, Nick will be an amazing NHL player. His skill level is off the charts