This is going to be a tough thread for people to agree.
First off, offense is overvalued and defense is undervalued. In a vacuum, defenseman also hold more value to their forward counterparts. Not to mention, Nylander is a one-dimensional winger that doesn't bring much more to that table other than pure offense (which is valuable, for sure).
Asking Jarvis is absurd.
Both are pending UFAs. Nylander is the more valuable player, but Pesce plays a more important position and arguably plays a larger role in the outcome.
Just a quick look at things, I would say
Pesce
Jack Drury
for
Nylander
Is more than fair. Drury doesn't really have a home on the Canes and can provide some key depth for Toronto, and still has potential. Put up good numbers in the AHL