You -should- be using Rupture as your finisher, and it should almost always be up on the target. So you should be able to use this pretty much whenever the C/D is up.

This doesnt even count bleeds from other classes...

Sounds like a buff to me..

stop qqing, frost mages can only use there 51 point talent on frozen targets and it has no use in pve whatsoever

Except when Fingers of Frost (http://www.wowhead.com/?spell=44545) procs...

Does anyone know for sure if the new hfb works from another players bleed on the target? Or only rupture? Either way I like it.

The wording is kind of unclear,as we dont know if HfB is still a self buff we need to renew every 30s or not. Keeping bleeds up on a target shouldnt be an issue tho, if you are a halfway decent rogue your rupture uptime should be almsot constant, and even if yours is, bleeds from other rogues and warriors ensure the boss is constantly bleeding and you get the damage bonus.

Id like this change a lot better if HfB were passive (ie, 15% damage bonus on all bleeding targets for the Mutilate rogue), but if we have to keep spamming HfB, Bliz still havent addressed the main annoyance of this spec.

@ Burix:

PvE frost mages who take Deep Freeze should be forced to take off all their gear and be humiliated by Rhonin-Sue in the middle of Runeweaver Square ala the Gimp from Pulp Fiction.

Seriously, that is some pretty epic failure.