Sea Ray, Mike Brown may not historically be a wheeler and a dealer, but in the last year +, they've moved Carson, Chad & Rivers for draft picks, something they rarely did prior. Times they may be a changing.
The Bengals could package their own 5th round pick, along w/ one of the extra 5th round picks to:
Move from 17 to 16
Move from 21 to 20
Which in reality, if they move up 1 spot in either of those cases, its because they're targeting a specific player and the team in front of them is seeing other offers, which means the Bengals would likely have to move more than 2 5th round picks.
They could also:
Move from 58 to 48 (This happens to be the Patriots, a team that usually seems happy to get more picks)
Package their 3rd round pick w/ 2 from the 5th to move up to the bottom of the 2nd/top of the 3rd round.
Package 2 from the 5th to move up near the top of the 4th round. (Is the draft set up the same as last year, round 1 day 1, rounds 2 & 3 day 2, rounds 4-7 on day 3? If so, this could be a move to move up to the top of the 4th to grab a player that didn't go in the first 2 days after all teams have a night to think things over)
Finally, they could package all 3 5th round picks for 1 mid 4th round pick.
Moving up in the 1st round, soley by adding 2 (or even 3) 5th round picks w/ one of their #1 picks has a very low % of happening, no matter what Mike Brown's track record says.
However, using the 5th round picks to move up 5-6 slots in round 2, or to the top of round 3 or 4 could be worthwhile and a better use of those picks than waiting to see who's available.
Now here is something to ponder, using that same chart, lets say the Bengals really wanted to move up and grab Andrew Luck or RGIII. Lets assume this could happen at 2 (where RGIII is 99% going to go), if the Bengals packaged Dalton & the #17 pick, that would assume Dalton is worthy of the #5 pick in this seasons draft. Now obviously this isn't going to happen, but what are the odds if you took what Dalton is considered to be at this point and put him into this draft would he last past the 5th pick????