Diseases and undead minions are where the Unholy Death Knight does her damage. This spec is popular for PVP due to shielding from spell damage as well as a much more useful ghoul pet. AoE damage is also very strong.
Expertise is the top stat for this build and needs to hit the soft cap ASAP. Note that Haste and Crit are equally important so mix gear that most easily takes advantage of these two stats.
Expertise: Attacks cannot be parried or dodged by most spell caster classes when Expertise reaches the soft cap of 3%. Of course more Expertise will increase this to include some melee classes but the cost is really too high. Before you spend resources boosting Expertise beyond 3% try it out and see how it feels.
Melee Hit: Special abilities will no longer miss enemy players when Melee Hit reaches the soft cap of 3%. Anything beyond this is a waste of points as far as PVP is concerned.
Strength: Increases all ability damage and attack power.
Haste: Increases attack speed and rune regeneration.
Crit: Increases the chance of delivering a critical hit.
Mastery: Mastery: Increases outgoing shadow damage by boosting Mastery: Dreadblade. This affects Soul Reaper, Scourge Strike, and Death Coil.
Glyph of Anti-Magic Shell
Glyph of Dark Simulacrum
Glyph of Icy Touch
Glyph of Resilient Grip
Glyph of Death’s Embrace
Weapon: Rune of the Fallen Crusader
Boots: Enchant Boots – Pandaren’s Step
Legs: Angerhide Leg Armor
Belt: Living Steel Belt Buckle
Chest: Enchant Chest – Superior Stamina
Shoulders: Greater Tiger Fang Inscription
Cloak: Enchant Cloak – Accuracy Enchant Cloak – Superior Critical Strike
Bracers: Enchant Bracer – Exceptional Strength
Gloves: Enchant Gloves – Super Strength
Engineering and Blacksmithing are seen as the two strongest professions for an Unholy Death Knight. Strength boosts and additional gem slots are big players for this spec.
The perks you will use with the above professions are:
Engineering: Synapse Springs, Nitro Boosts
Blacksmithing: Socket Bracer, Socket Gloves
Unholy Death Knight in Action
About This Build
This is a great video that focuses on what works best in RBGs and Arenas. The author also discusses macros and other optional abilities you may want to try out. This video is from TheChaz. Check out his other DK videos, they are good stuff.
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