I can understand what you're trying to do (pure BG gankage), but I think the combination of a dagger and hemo is really going to bite you in the ***. I'd say just drop Close Quarters Combat, grab Puncturing Wounds and stick with Backstab. Use the leftover points plus the one from Hemo to pick up at least a couple of talents that improve your cooldowns - if you're going to be a BG ganker having no Heightened Senses or Dirty Tricks is fine, but Elusiveness is pretty much a must in any PvP build. When trying to stick as close to what you have but modifying it for Backstab/cooldowns,
this is what I get, though I suppose the point in Filthy Tricks would be better off in Honor Among Thieves for what you're trying to do.
The problem with rogue specs is that there's simply very little variation possible - Mutilate is good in PvP and for BG ganking regular Shadowdance simply works best. Heck, even trying to specifically create an 'anti-warrior spec' with Setup and Ghostly Strike is pointless because if that's what you want you might as well just go combat. Going from the build you have posted I could improve a lot of things but doing so would just make me end up with the standard Shadowdance cookie cutter.
In before the "zomg spec sucks go cookie cutter". Edited, Dec 4th 2009 7:10am by Mozared