I had the same problem except it was with my powder blue. My powder blue loved sleeping in a nice little cave I have with my LR, but unfortunately, the Coral Banded had already decided that it was his cave. After several altercations, I decided to yank the CBS's claws off. For about 2 weeks everything was happy: The coral banded still got to hang out in his cave, since I had a very well-tempered blue tang who left him alone. And none of my fish got picked on. Then his claws grew back and so did his horrible personality. That's when Mr. CBS made a trip back to the local fish store.
Long story short: If your CBS is being a
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, don't expect things to change. Get rid of him if Flame Angel's occasional torn fins bother you.
Hope I've helped.