I think you’d need to upgrade the third to a second.

Also believe the second prospect would likely need to be their choice of any prospect not named Lohrei, Lysell, or Poitras.

Even then, they may get a better offer. But I believe that would be respectable and probably close to what it would take to get him.

Interesting including Forbort instead of Grz. I’d let them choose knowing that retention will increase if they choose Forbort. My assumption is Calgary wouldn’t be on his three team no trade list

Calgary will probably want more especially if they retain. The Arizona trade doesn't work for Boston. Not sure how you see it but 1) Bruins shouldn't waste an asset to get rid of Grzelcyk; 2) Dumba sucks, is still not worth $2M and Bruins already have a similar player in Shattenkirk; 3) O'Brien isn't worth a 2nd/3rd pick either