I think a popular starting build is a bit of frost then unholy. I think the frost strike pvp build is much more gear dependent, but I use an unholy one on my dk (my gear is pretty poor, unenchantd and cheap gems) but it's still fun.

I don't see why you couldn't have both of them if you want. There are lots of other talents in the unholy tree that provides a 0.5-1% dmg increase and nothing else that you could skip if you wanted to include Unholy Blight. UB is not terribly useful in 2on2 though. There are not many situations where you want such a slow aoe, and the damage increase over Death Coil on single target is marginal at best and because of kiting/burst issues not really an increase at all. Some people use it as a tool against stealth teams since it can be very hard to approach a DK with UB active without getting hit by it.

Concerning your specc in general, if you have little experience I'd recommend that you simply copy the specc from a high rated DK. Look around on the top of the ladders and see how people are specced. There are some small differences depending on personal preference or setups, but most people will be specced roughly the same and that is the same builds you would get from people here.

This is my current spec and Im having alot of fun with it atm.

The World of Warcraft Armory

I will tweak it a bit anyway to pull a bit more damage, like droping epidemic and UB in favor of 2 points in necrosis and 1 point in impurity giving me 8% more on shadow damage and 4% on all damage.

I dont feel that epidemic gives me a huge benefit because we keep changing targets all the time and all encounters are too fast. Maybe in arena but I havent tried it yet with this char.

This build has been my starting point in pvp, have tried some frost and unholy full dps builds but ended up returning to this one which gives me more fun playing.

Has anyone had good results with blood cleaving in 5v5 or 3v3? Was thinking of changing to blood now that 2's are useless.

Also, how do I keep my diseases on the target? Any good healer can just spam cleanse and nullify my damage

DK's need more ways of doing anything without a melee weapon come 3.2.

Disarm is no fun.

Are you fucking stupid? We're lucky we can do anything while disarmed. Most melee classes get completely screwed any time they get dismantled; we can still use our major CC's and peel for healers through CoI, Grip and HC.

Disarm mechanics are there as a soft-CC to melee classes, in the same way that Silences CC casters. Allowing a class to continue to function through this type of CC would make them incredibly overpowered (more so than we already are).

[e]: Yeah, I'll probably get an infraction.

I'm 134% with Darkside here, down to each word.

Disarm is barely a kick in the nuts for DKs, compared to the complete neutering it is for a Warrior/Rogue. Thankfully (or on the flipside, painfully), we can still use our magical abilities which are plentiful.

Look, disarm is SUPPOSED to screw you; that's the intent of it. It's no different than a caster getting chain-silenced or you getting chain poly'd/feared/blinded. Furthermore, getting disarmed hardly affects your survivability at all. You are no more vulnerable without a weapon than you are with one. You can still use all your defensive cooldowns and peels, hell you can even still interrupt, which is a hell of a lot more than Warriors can do. That's the primary reason why we don't have a -disarmduration talent. Just wait our the disarm and then continue to apply pressure.

[e]: Fair enough on the parry point, but if the lack of parry is what's getting you killed you have far bigger problems than just the disarm.

Not true, you can't parry - but that is really a minor point.

You'll probably have to move the shaman out of his totems with a grip and position him next to his partner. HC both of them and go for a kill on whomever you think will be easier to bring down. If the other person trinkets the HC, have the rogue blind them.