Okay, so here are their names: https://static.wikia.nocookie.net/4c75657a-ed2f-4974-9c4b-0f93fcd5bd90

According to that list, the lines (as I currently have them) go like this:

Pasaana Chewie Scene (two KoR watch Chewie in the desert):
Ap’lek: A friend of Luke’s.
Kuruk: I get his teeth.

(It’s quite clear which Knight is speaking due to the body language)

Kijimi Alley Scene (the KoR pause in an alley just after Rey and the gang passed nearby):
Ushar: Luke’s scavenger girl. She’s close. Spread out.

(Ushar is the one in the middle, and assumedly is giving directions to the rest)

Exegol Ben Fight Scene (the KoR confront a weaponless Ben):

As they initially circle him:
Ushar: Well, look who finally made it.
Trudgen: Still chasing the girl, Ben?
Kuruk: Palpatine was right. You’re weak.

(Ushar is in front of the first shot, Trudgen is closest to the front and center in the second, and Kuruk is centered in the third)

After “She will take her revenge”:
Vicrul: What a disappointment.

(Vicrul is in the beginning of the shot and pans slightly behind Ben. Trudgen is also in the shot, but it doesn’t feel like he’s the one speaking)

When they see Ben’s saber:
Cardo: (mutters breathily) Oh, that’s not fair.

(Cardo is in the foreground and has the biggest physical reaction to the saber reveal)

This gives each Knight at least one line. So we would need six voices in total. To show a quick reference:

Scene 1:

Ap’lek
Kuruk

Scene 2:

Ushar

Scene 3:

Ushar
Trudgen
Kuruk

Scene 4:

Vicrul

Scene 5:

Cardo