I doubt Mike Smith will last 4 rounds of play off hockey

and carlson is not worth 7 million maybe 5.5 Million

You're paying WAY TOO MUCH for Duclair and Domi right now, along with Dauphin. Why pay 4.65 million to someone with 3 points this season (Dauphin) when you clearly have Chychrun, Crouse, Strome, Dvorak, Merkley, Deangelo and Fischer all needing contracts the very next year. OH AND DON'T FORGET OEL! He's gonna command MAJOR money. I think it'd be better to hold your assumptions on Dauphin becoming amazing until we actually see something and focus on Stone rather than Carlson (Since Washington will NOT give him up, no way no how). Dvorak could seriously blossom and Chychrun is already proving his worth in his first year.
Jot notes.
Dauphin - Probably going to get a short term bridge contract till he proves himself
Domi - Probably worth around 5 million dollars or shy of it on a shorter 4-5 year contract
Duclair - Look at Bjugstad numbers but probably around 4.2 - 4.5 million for 5-6 years
Carlson - Not coming over
Focus on Stone and making sure you have cap for Ekman-Larsson, Strome, Chychrun, Dvorak, Merkley, Crouse, Deangelo, Fischer and Stone rather than waste too much money on three players - especially one so unproven.