Addison on a rookie contract would be an insane pickup. I doubt you get up to #5 to get Marv. Maybe you could entice the Giants to move down if their QB is gone so they could select one of the 2nd wave QB's with #23. Of maybe you can swing keeping 23 and give 27. But they could say screw you if we traded the pick to someone else to select their QB.
Given Monti's links the Titans at 7 might be feasible, and Falcons added Mooney to London and got the highly-rated Rondale Moore in a trade so maybe at 8?
You'd have to expect Harrison to be gone with any of these scenarios and be ok with Odunze. Even that's a risk of not happening. But you don't make a trade back up unless he's on the board.
Still, this is getting cute, so unless Monti has balls of steel and intimate knowledge of what teams want in this range he it's a big risk.
I have a hard time believing that the Vikings would trade Addison. He's a hit.