Call me crazy, but I don't see Newhook or Byram even being a consideration for Colorado.
Giroux is the captain of the Flyers with a full stop NMC. He should hit 1000 games with the organization before being dealt. If he's going, he's in full control. They'll be an element of "fairness" in the deal, but it's not going to involve one of the Avs 2 prized young players.... especially with Kadri being an impending UFA.
I'd suspect the deal would be Colorado's 1st in 2023 and Drew Helleson or Justin Barron. Colorado will have to find another team to retain 25%, but I doubt that'll be expensive considering his salary is only $4m, and it seems like there might already be 8 teams in the east eliminated from the playoffs.
I also don't really see his fit with the Rangers. They're too young. If he's leaving Philly, it's to go get himself a cup. You've gotta think Colorado gives him the best chance of doing that.