Originally Posted by
SkillOverKill
I do a lot of shadow pvp and I'd like to think I'm a fairly knowledgeable person on the subject. Personally, if I didn't have at least normal cunning of the cruel let alone heroic (I swap between heroic cunning / pvp trinket, and double pvp trinkets depending on what we're up against), I would be using resilience pieces. You won't see a significant dps increase swapping to bottled wishes, and hardly with normal VPLC. You will feel a significant survivability increase with higher resilience however - and if you honestly end up around 5k resilience as a shadowpriest - you can shift your strategy to offer yourself to your opponents (by overextending) to distract them from your more frail dps and healers.
If you really had to pick something to up your damage, I'd go with VPLC - more int = more mana, which is the biggest limiting factor in my RBG damage, it's also the higher flat dps increase, and the proc makes you even more bursty which is good. The haste gain from bottled wishes isn't bad but unless your getting extra ticks out of it, and even then really - that trinket is all about the on-use effect. The problem with on-use effects in RBGs is while it might help some of the time, most of the time it does nothing for you - VPLC and Cunning never turn off (and neither does resilience for that matter).