That's actually not a bad trade. A few things: The sens need prospects at right wing and on the right side at D. Maybe Nylander, Leivo, Piccinich/Bracco, Rassanen and the picks? idk

Unless you give up something like Matthews or Marner the Sens would never trade Karlsson to the Leafs. And I would NEVER trade those two. The Sens can barley fill the rink and it's mostly due to their big bro, the Leafs, sucking up all the air in the room. So regardless of the package you dream up it won't be enough.

That's quite the firesale! Nylander, the bank of picks and prospects depleted for two defensemen who are both UFA. They better win the cup next year.