You might consider making your offspec assassination pvp. the talents are pretty different, and you would die even less if you had imp recup for pvp.

I was combat back in TBC, but went mute for Wrath and also never looked back.

I now have my main spec for dungeon running and an offspec, also mute, for soloing and questing, and it's great. My ret paladin had far more trouble in Tol Barad than the rogue ever did.

@Hail: Assassination is my main spec. I do an equal amount of PvP and PvE, and I use the same spec for both, but different armor sets. I often use recuperate (with improved recuperate of course) in both settings. In PvP to stay alive, and in PvE to stay alive and put a little less pressure on the healer.

There have even been multiple times, while running heroics, where our tank would die and I'd end up "tanking" (Popping Evasion and/or CloS and/or Combat Readiness) while healing myself with imp Recuperate and having a healer on me(if they're not already dead). I can think of 6 or 7 times now where I've downed a heroic boss doing so... Granted they are typically under %10 at this point.