This draft thing really isn't that hard. Under no circumstances do you trade up this year. Here is the most sensible plan and it is so mind numbingly simple that I'm embarrassed that I have to even say it.
Step 1 - Throw the extra coin at Jones and get him signed so that DE is not such a pressing need that you feel compelled to reach for one at 4. You can add one to the mix somewhere between the 2nd and 4th rounds.
Step 2 - Sit back smiling for 45 minutes until you are on the clock knowing you are about to add one of the following to the team: Wentz, Goff, Ramsey, Tunsil, or Elliot. Two of them will be there. You either solve your QB problem and feel good about the future of the position, add a dynamic and versital DB that will make the defense much better, build on a massive strength at OL and make the unit almost laughably unfair and enjoy running your offense through them for the next 10 years, or you add an extremely talented RB that should be able to take you back to the type of offense that led you to 12-4 in 2014. Any of the five options should be agreeable to nearly everyone and would add an immediate impact as well as serve the team well long term. Do not try and get cute and outsmart everyone else. Take one of those five and enjoy the fruits of a crappy season.
Step 3 - Keep smiling the rest of the draft knowing the team is already much better than it was.