Okposo has one of the five worst contracts in the NHL. Buffalo would have to pay to get rid of it, and Henrique >>> Mittelstadt.
@wabit is right that there is a simpler and more direct deal here. It depends whether you want Henrique or Steel.
Henrique is a valuable player for us because as Getzlaf ages out (he has one year left and might re-up for one more season after that), he will be our only experienced top-9 centerman. His value is the Pittsburgh pick plus a roster player. Dumba's is similar, but we wouldn't trade him without getting more than just a first-class RD, so I think a deal structured around that would be hard to create.
Sam Steel is another matter. Dobber rates Steel precisely the same as Ryan Donato and on a par, more or less, with Luke Kunin, although both are wings and not a center per se. I feel in my bones he's comparable to Eriksson Ek but I may be optimistic. Steel, Larsson and our 2020 second (36th overall) seems a little rich for Dumba, but maybe not. Steel, Larsson and our 2021 second would be an automatic yes from me.
Give that some thought and of course, I'd love to have the input of
@TanSor and
@MNBassman