Noob question here (I play around 1.3k rating, just for fun really): how do you beat an unholy dk as a destro lock? Any tips of things I should look for? Any video "guides" on how to beat them?

Only time I manage to beat them is with some fear into buffed CBs, but most of the time they endup trinketing and AMSing, or poping another big defensive (IBF etc)... Then their diseases start to slowly eat me alive while somehow they are self healing like crazy, out healing my ember taps and other self heals... Another class I have similar issues like that is WW Monks, but this one is just a lost cause I don't even bother trying to kill

Anyways, please remember that I'm a a noob pvp'er but can usually put a decent fight again most classes with people around my (un?)skill level