Greetings from Portlandia
Here's what I would do... If I were convinced that we need to move to #6 to draft our next LT, I would offer #12 & #42 to Cleveland for #6 and #104... You hear about the value in this draft being in the 2nd & 3rd rounds, well having run 2 7 round mocks in VIP, it is apparent that there are 150+ very strong and interchangeable draft prospects this year. Marcus Lattimore, Mike Glennon, and Johnathan Franklin (and 20 more lesser known but talented prospects) were all drafted in round five. In other words...at pick #104 there will two dozen 2nd and 3rd round grade players, who have slipped, to choose from. These players will have just about as much chance of helping the team as the guy at #42 will. I might even be inclined to accept #139 instead, if they won't make the #104 deal, as long as I get a lower pick back. In our mock that means I get Johnathan Franklin (#139) instead of Giovanni Bernard (#42)(which one will be better anyway?) plus I get my LT. Or if I had another deal in place to add picks in rounds 4, 5, even 6 with some other team as long as I'm getting my 11 picks (at least) it's all good!
Make your own rules!