If Ducks are actually the front runner for Eichel and land him, this is definitely out the window as the Ducks are trying to make playoffs to appease him.
If that doesn't happen, then trading guys away (more Rakell and Manson, not Gibson) is likely. It ends up being:
Gibson (at $5.4 mil/year)
6 years of retaining $1 mil
Rakell
Manson
For:
Byram (definitely a high end piece, Ducks would love to have)
27th overall pick (decent value, not great especially in this year's draft)
Grubauer's rights (little to no value to the Ducks if they are rebuilding, downgrade in goal and likely more money, especially with the retention)
EJ's salary (negative value)
Kaut (don't know much about how he projects, 21 year old winger isn't bad though)
Helleson/Barron (would definitely be of interest if they can eventually fill the 2nd pair RHD behind Dry)
Compher and (especially) Donskoi don't hold much value to the Ducks either (age)
So 3 of the pieces coming back have no value to Anaheim or negative value. Byram has huge value, I'd say Helleson/Barron are the next most valuable, and 27th/Kaut having some value (not sure how Ducks scouts would view either). I feel like the Ducks would ask for Byram at minimum for Gibson with $1 mil retained. I think, if the Ducks make a deal for Rakell and Manson, they should wait until after the expansion draft, let teams negotiate a new deal with them, and trade them for more than as a 1 year rental.