I'm feeling generous and will therefore just give you a warning. You actually posted your question in the correct place and it was somewhat well-constructed. Please be mindful to capitalize and punctuate properly. If I catch you QQing again I'm going to give you the biggest wedgie ever.
I have been arms since uld, and more recently been looking back into going fury due to lack of need for an arms warrior. I have been lurking pretty hard on the fury threads and i can't seem to find any real solid numbers on how much of a dps boost stance dancing to apply rend is, I have a feeling it might be quite minimal or possibly even a loss in light of the new HS bug and DW munching. Also i am unable to spreadsheet cause i dont have excel QQ.
TL;DR- Is applying rend a dps boost and if so how much?