I'm not sure there's a spot for Berggren in the lineup. Currently, the LW are Gauthier, Killorn, Vatrano. Verbeek has said he wants another top 6 RW and the Ducks have Terry and Strome there with Colangelo possibly ready by the end of the season. Then it's Carlsson, McTavish, and Zegras down the middle. Ducks really need a RH shot RW, only Terry and Strome are righty in the top 9.
After that, Ducks need to revamp their 4th line. This night be a piece Verbeek targets. A high end 4th liner that can anchor that line, even if they are overpaid for the role (assuming the contract doesn't go more than 2-3 years).