DK build:http://wotlk.wowhead.com/?talent=jfV0kZZfM0Itckgcq0fsut death and decay, stacking diseases on one of the mobs, spreading them to all mobs with pestilence, then spamming blood boil and corpse explosion. (Death strike + bone armor low hp)

Warlock lvl build: http://wotlk.wowhead.com/?talent=IbxRbuZbgczsgoAcsguho , grind macro

Warlock instance build: http://wotlk.wowhead.com/?talent=IZcLc0MZVchqr0tVsAfst , CoE, immo, incinerate spam & conflagate and chaos bolt when avalaibe