I have a level 75 Death Knight and some people keep abusing me cause when it comes to doing a Random i seem to be on the bottom for DPS most times, so i was wondering what Spec should i use for Random's? ATM i have my talents spent in Blood and Frost but don't think i had spent them right so was hoping someone could tell me which Spec i should do and what i should focus on when spending my Talents.

these are my current Talents spent;
http://www.wowarmory.com/character-talents.xml?r=Khaz%27goroth&cn=Zathos&group=1
Also, would be helpful is someone could also give me some hints on what Spells i should such as in combos etc.. please