You forgot to add a 3rd in the trade for Edmundson.

Interestingly I think a 2nd and a prospect woudl secure Wennberg with 50% retained - proposed as much myself here: https://www.capfriendly.com/forums/thread/811743
However, we've no interest in Goodrow for the next 3 years and certainly not for the compensation of just a 5th and a 6th. You'd need to find someone who actually wants him, which may be a tad difficult.

he's not worth that much. maybe a low 4th, but a 3rd would be an overpay, let alone adding more picks on top

yeah which makes it difficult. the rangers aren't 'that' crunched for cap with a few ltirs, so they could prob just get wennberg at full. something close to: wennberg and a 6th, for goodrow, (prospect: insert robertson/sykora), a 2nd and a 3rd/4th. something like this could be an incentive where the initial trade has some lower value, but player/team performance ups the overall return