I would package Julien, Kepler, Larnach and low-level minor leaguer for Gilbert.
Seattle fills 2B, covers the RF loss of Teoscar Hernandez, can maybe get Larnach on the right track (he's a west coast kid and played at Oregon State) and gets a throw in that may or may not pay out.
Minnesota still has Polanco (and Farmer) to hold 2B down until Lee gets here mid-season, moves Kepler for salary relief, allows Larnach to possibly reach his potential (evidently not going to happen here) and fills out the rotation.