2 trades:
Robertson to DAL for Stankoven
At first glance this make look like a bad move but the Leafs essentially get the exact same player but 2 years younger and less injury history. It is basically a do-over on Robertson with Robertson seemingly being passed on the LW depth chart by Knies and Bunting probably holding the 2nd top 6 LW spot for a few years. Dallas still has to sign Robertson's brother and this may help them in signing him long term which is why they would be motivated to do it. Dallas' top 4 forward prospects are all right shots so they could use some diversity (Stankoven, Bourque, Johnston, Dellandrea). Stankoven arguably had a better D+1 season than Robertson and won CHL player of the year as a 18/19. Stankoven is also a right shot which the Leafs lack in the pipeline (Knies, Amirov, Hirvonen, Holmberg, Steeves, Minten are all left shots). Stankoven also plays with Minten which will give the Leafs a duo that can grow together - not sure if that really matters. Assuming Stankoven stays in the CHL this coming season his ELC won't expire until the new Nylander/Matthews/Marner contracts are completed. The Athletic also has Stankoven listed as a better NHL prospect
Link to The Athletic's top 50 NHL Prospects
Sandin to ARI for Hayton
Myself and others have proposed this in here many times and it just makes too much sense. Maybe include Kerfoot going to ARI and a pick coming back.
These 2 trades would bolster the Leafs offensive depth, Hayton slides in as 3C with room to grow into 2C in 3 years when Tavares expires. Stankoven marinates for another 1-2 seasons and steps into the lineup with multiple years left on his ELC.