Is this how you want the lines?..

No I just posted them as is, here, let me change them.

Pheonix Copley and Richard Panik for Chiasson and Khaira?

Idk if Washington would take on the cap room, let alone give up Copley with their goaltending situation.

Okay, so take out Chiasson and add a B prospect?

I'd be inclined to keep Khaira and trade Chiasson.
Who's also more comparable to Panik and around the same age.

I kinda think last year, defensively, Panik was the best player in the idea, because he played against decent competition and had decent fenwick, and Copley would be the most valuable to Edmonton as a proven backup goalie for two years at almost no cap hit.

The Caps have nine established NHL wings, three goalies, and four centers. They're not giving up a depth goalie for a depth wing who they already had at 4R. Panik is as good a goal scorer as Chiasson when given the same opportunity.

Ages are Khaira 26, Copley 28, Panik 29, Chiasson 30? WSH could throw in a 7th to balance that if Edmonton getting the two players it needs the most in the deal isn't already enough. Or build your own Copley offer out of picks/prospects/cheap center depth?

What about throwing Mike Smith into the deal?

Caps don't have any cap space, and have two starting goalies, plus two backups.

edit. What about swapping Chiasson for Archibald or someone else so the cap is still close?

What about retaining half on Smith so the Caps can either bury him or Samsonov in the minors?

Ok. Just made a deal. Check it out.