The value for just Henrique doesn't look too bad. Though as mentioned in another thread, the Ducks have a ton of prospects/young players and also a ton of picks already. Their best course is to deal with whatever team is willing to part with the single best asset to build a trade around.
I understand that Ritchie is too impressive of a prospect to deal for any rental alone, but could the short term benefit of a trade stack up enough to make it worth making him available? If he's on the table, I would have no trouble adding Vatrano at 50% (one year remaining) and taking back RyJo. Henrique and Vatrano's halved cap hits are barely more than Johansen for this year, and the Avs get significant savings next year.