http://tinyurl.com/pfaxyle (Ravenholdt.net blog)
The tl;dr is that if you have two subtlety rogues, only one will ever benefit from sanguinary vein, which both increases rupture damage by 10% and all other damage by 20% for enemies affected by a rogue bleed. Whichever rogue applied a bleed most recently will get the effect, while the other will not benefit until they refresh their own bleed.
The tl;dr is that if you have two subtlety rogues, only one will ever benefit from sanguinary vein, which both increases rupture damage by 10% and all other damage by 20% for enemies affected by a rogue bleed. Whichever rogue applied a bleed most recently will get the effect, while the other will not benefit until they refresh their own bleed.