Watched the Phanna set.
Your manuverability is excellent, and you used it to create opportunities abundant; very good, Samus is tough to get in on. Good use of PK thunder in edgeguarding as well, but watch those whips when your opponent can easily recover. With Samus it's not so much about edgeguarding as it is racking damage, and thunder does that well enough. Can you edgehog and drop down with an N-air when she recovers low like that, then use your 2nd jump and airdodge to regrab?
You could use work on your Fair combos; you seemed to stop chaining at about 40%, when you need to switch from a second f-air to slightly slower up-air to gain that height (vs. Samus anyways), but you had good pressue, and you followed Phanna really well, considering he's known for his flashy moves.
Good work defensively overall, actually, but you could work on your recovery against those missiles; it's what got you killed in the end, and IMO, it's where you lost the set. You can use your airdodge and fastfall to cut through them and hit the ledge before she can hog it, usually, as well as otherwise using your fastfall to dodge.