OK first and foremost DK's need to gem strength and more strength unless they are tanking. Dk's get two attack power for every strength. Second the only enchant is Rune of the fallen crusader, use it only unless u are tanking. Hit cap is important, and expertise is important. 26 expertise cap, and 8% is the hit cap unless you are a dranei then it is 7 because u get one % from racial. The old standby blood spec is the 51/0/20, and for you in the gear u are in the 17/0/54 for unholy. If you are going to go blood then the rotation is Plague strike, icy touch, heart strike x2, death strike, death coil dump, death strike, heart strike x4, death coil dump rinse and repeat. The unholy rotation is plague strike, icy touch, blood strike, scourge strike, blood strike, scourge strike, death coil(to dump runic power) horn of winter rinse and repeat. You can go to Krenian's sticky on here Death Knight Raid DPS Compendium (FR/BL/UH), or this one for some of the answers you are seeking Unholy Death Knight guide 3.3.5. Both are good and the second one is geared to unholy dk's but krenian covers all the specs and is the original and is the best.