Well, I went through the majority of the cast to see what 22A/C can and can't reflect. As far as I can tell, 22B and j.22A/B/C don't have the reflective property, but I didn't really test it out, so please correct me if it does. Here's what I have so far (have not tested on the Necos, Akiha's, and anything with Kohaku or Hisui, team or solo). Also, unless specifically mentioned, both 22A and 22C will work.
C-Warc: 214A/B/C, j.214A/B/C and 63214C
H-Warc: 214A/B/C, and j.214A/B/C Does not work on 236A/B/C
F-Warc: 214A/B/C, and j.214A/B/C Sidenote: 22A will counterhit in your favor if done in reaction to 63214C (the dash claw ex)
C-Aoko: Nothing
H-Aoko: 214A/B/C Note: C version will Circuit Break Aoko if it hits her after it is reflected.
F-Aoko: 236A/B/C Note: I've only been able to reflect 3 of the hits of the C version with 22A, which will get you about 1k. 22C will reflect the entire thing for 1.5k.
C-Ciel: 214[A]/B/C, j.214A/B/C Note: Reflected 214[A] keeps the "stick and explode" property. I've only been able to reflect the first two parts of 214B with 22A. 22C is weird because the first 214B knife will go straight through Kouma, and the last two will be reflected. 22A will reflect the first 3 knives of 214C, with you taking and giving about 500 damage. 22C against Ciel will reflect 4 knives, doing 600, with you taking about 100 damage. Against j.214C, it will only reflect the first two or so knives, you'll eat the rest of it.
H-Ciel: 214[A]/B/C, j.214A/B/C, 236[A]
F-Ciel: 214A/B/C, j.214A/B/C Note: 22A can reflect the knife of j.214C, but not the shadow that comes out. If you reflect the knife, the shadow will still come out and damage and freeze Ciel in place.
C-Sion: Nothing
H-Sion: Nothing
F-Sion: Nothing
C-Wara: 2[C], 63214C Note: 22A will reflect one ring, 22C will reflect both. If the Warc shadow is right on top of you, then both rings will hit you and not be reflected.
H-Wara: 63214C Note: Same as above.
F-Wara: 236A/B/C, j.236A/B/C
C-Roa: Nothing
H-Roa: Nothing
F-Roa: Nothing
C-Mech: Nothing Note: wut
H-Mech: 236A/B/C Note: 236B(golden fist) can only be reflected by 22C.
F-Mech: 236C, 214[A]/{B}/C Note: Doing 22A/C against 214[A]/{B} is a bad idea.
C-Len: Nothing
H-Len: Nothing
F-Len: 236A/B/C
H-Satsuki: 22A/B/C
C/H/F-Ryougi: As far as I can tell, nothing. I have not been able to reflect the thrown knife, but that could just be timing issues on my part, as it is fairly fast.
C-WLen: Nothing
H-WLen: Nothing
F-WLen: 236A/B/C, j.236A/B/C
C-Chaos: 236A/B
H-Chaos: 236A/B
F-Chaos: 236A/B Note: Using 22A/C on the 236B bird will cause it to turn around and head towards Chaos. If the bird is fairly close to you when you do the 22A/C, it will just dart towards Chaos instead of hovering to him.