Bertans is really good, but not some all-star starter. Even if our pick + Bucks are both projected to be 25-30, I don't see why anyone should be that willing to surrender TWO first rounders for him.
The other piece of this is that we'd have to match salaries, meaning we'd have to give up more than players we'll never use - Poirier isn't enough, and even adding Edwards doesn't get you there. I can't see adding Langford to that offer, *plus* picks.
Honestly if we sent Edwards and Langford, I'd want them to send *us* some kind of pick swap. They're cost-controlled for three more years and Langford clearly has talent. They can have the Bucks first next year but we want a draft asset from them the following year. I'd love a protected pick swap with the protection phasing out over time.