I'd take Vargas and League

Vargas + League is a nice package regardless of what happens with the pursuit of an ace. 3? years team control of Humber has to be at least somewhat appealing for Z in Seattle, provided a couple nice prospects finished out the package. Humber is a change of scenery guy who could maybe get his confidence back by returning to a low expectation, non-contending situation and doing so in a pitcher's park. Humber + Mitchell/Thompson is a potentially great deal for Seattle given that the players they would be acquiring have higher ceilings than the players they'd be trading and also would be controllable for longer. And if it's me I'd throw in a lil extra to just to keep Mitchell and ditch Joe Borchard Jr.

 

Humber would be appealing if he pitched against the Mariners all the time. Unfortunately, if Jack Z gets Humber, he will never get to pitch against the Mariners.