I'm going to be a bit harsh, so please don't take this too personally
prefix counts for five points, suffix counts for five as well
Firespirit - 5/10. "fire" is an okay prefix if the cat is ginger, but what on earth would "spirit" mean about their personality? remember, warrior names are like this: prefix for looks, suffix for personality.
Brambleberry - 6/10. I don't recommend the "berry" suffix. if they are a medicine cat and good at healing, try "leaf." if they are good at tracking and finding scents such as prey, herbs, and berries, try "nose." bramble is a nice prefix though.
Scarface - 8/10 as long as this is only because of a name change. to have this name the cat must be very heavily scarred, likely from battle. if the cat did not have a name change, this is a big no-no.
Shykit - 4/10. the "kit" suffix is obviously because they are still a kit, but the "shy" prefix is a big no. how does a "shy" look? not a shy cat, a "shy." remember, the mother usually names their kits right after birth so there would be no knowing what the kitten's personality would be like.
Wolfhowl - 4/10. "wolf" is fine, if not my favorite, but "howl" isn't great. what does it represent about the cat's personality?
Frostedlake - 5/10. "frosted" might be better changed to "frost" as long as this is a white cat we are talking about. "lake" I think should be changed, for the same reason as "howl."
Icefox - 5/10. "ice" is good, but "fox" is not. see the above two names.
Foxsnow - 4/10. "fox" would be okay for a ginger cat, but you really need to work on your suffixes. see the above three names.
Sundust - 1/10. "sun" would not be used as a warrior name. the sun is an important, almost sacred thing to the cats and naming a kit something like that would be putting it above the rest. that's not a good idea. for the suffix, see the previous four names.
here are some of my names:
Batfang - dark brown tom with a knack for fighting and hunting, deputy of his clan
Minnowfoot - small brown tabby she-cat, quick on her feet and a bit wishy-washy
Reedstorm - a golden brown tabby tom with a volatile personality, quick to anger and distrusting of others
Nettlepelt - light grey she-cat with not many outstanding qualities, quite shy and a bit gullible