Only hope would be to frag off some ends that aren't bleached. I'd hurry and frag off a few then glue the bottoms either to the LR or to some frag plugs.
Make sure it's getting a lot of light and don't get any bleached patches in the parts you frag just in case it's RTN. This is a parasite the very quickly knocks out a coral, usually from the base up. Suggestions from my limited knowledge and unprofessional opinion but that's my guess.
Sorry that piece took a hit, it has some great size to it!