Joint Beat, Head Crush

[raphael.cruger]

Can someone tell me if these two skill are at all useful in ANY context?
Woe, PvP, BG, PvM, MvP whatever.

I can't seem to find any info other than the fact the for Joint Beat u cannot tell which break u have inflicted and that it is somewhat useless in woe as compared to BB, spiral, and the like.

Does Joint Beat work on MvPs?

Is the Bleeding status any good?