The Panthers and Saints have several overlapping needs most notably WR, but CB,,OLB and even OT are also in play. Say your favorite "falling star" makes it to 26, going by the Walter Football NFL Draft Value Chart it would likely take our 4th round pick to jump up and get him while sticking it to our divisional rival. This trade would spot the Browns 8 points which is a mid 7th round pick according to the chart.
My trade up mock draft
26 - Insert your "falling star" WR within reason
60 - OT Antonio Richardson, Tennessee
92 -OT Billy Turner, North Dakota State
168 - CB Walt Aikens, Liberty
204 -CB Aaron Colvin, Oklahoma
225 - OL Wesley Johnson, Vanderbilt
FYI: In order to jump the Saints in the second round it would likely cost our 5th round pick to get to 57th, which would be within 1 point using the chart.