So I put together a ret pvp set for leveling (have a bunch of t6 pve ret as well), click on my sig if you want to see it.
Then I didn't even get to use it cause no one wants to mess with Ret! Seriously, on a PvP server and only saw 6 HK's all night. 2 of which involved me stopping to save some alliance in kara gear getting ganked . The other 4 involved me killing a T5 Warlock/Holy Pally combo twice solo.