I think it would be more prudent to try Puljujarvi on the 1st line, i think he will be the real deal. Why waste that potential hoping for Yak to wake up? Leave Yak on the 3rd line.
Hows it a waste with Puljujarvi on the 3rd line . He gets a good C to play with , He gets soft minutes and a vet in Maroon to help out if anyone takes a shot at the kid . Sets him up to succeed .