Death Knight spec options and Rotations in Patch 4.+

So i did play a DK early on when they were first released, and well it was the first toon that i actually hit the level cap with, then they were nerfed a bit. But now in patch 4.1 they are quite strong again in both PVP and PVE.

I have found a bit of stuff on them so i thought i would post it here, check it out.

Blood Spec Death Knight

Popular Level 85 Blood Death Knight Talent Builds

Blood 33/0/8
Blood 33/6/2
Blood 33/0/8

Blood DK Spell Rotations

Blood PVP, or Single Target Rotation

1. Diseases
2. Rune Strike
3. Death Strike
4. Scarlet Fever if its up / Plague Strike, Blood Boil
5. Heart Strike
6. Icy Touch

Blood AOE Rotation

1. Death and Decay
2. Diseases
3. Pestilence
4. Scarlet Fever if its up / Plague Strike, Blood Boil
5. Death Strike
6. Blood Boil
7. Heart Strike
8. Rune Strike
9. Icy Touch

Easy AOE Rotation (usually good for trash or low health mobs)

1. Death and Decay
2. Icy Touch
3. Plague Strike
4. Pestilence
5. Blood Boil
6. Death Strike

Frost Spec Death Knight

Popular Level 85 Frost Death Knight Talent Builds

Frost 7/31/3
Frost 8/31/2
Frost 8/31/2

Frost DK Spell Rotations

Frost PVP, or Single Target Rotation

1. Diseases
2. FF apply with Howling Blast
3. Obliterate
4. Blood Strike
5. Frost Strike
6. Rime
7. Horn of Winter

Weapons:
Duel Weild use Frost Presence
2H use Unholy Presence

Frost AOE Rotation

1. Howling Blast
2. Death and Decay
3. Plague Strike
4. Frost Strike
5. Horn of Winter

Presence: Frost

Unholy Spec Death Knight

Popular Level 85 Unholy Death Knight Talent Builds

Death Knight Unholy 6/0/35
Death Knight Unholy 5/3/33
Death Knight Unholy 0/6/35

Unholy DK Spell Rotations

Unholy PVP, or Single Target Rotation

1. Diseases
2. Dark Transformation Active
3. Scourge Strike
4. Festering Strike
5. Death Coil on Sudden Doom proc
6. Horn of Winter

Presence: Unholy Presence

Unholy AOE Rotation

1. Diseases + Pestilence
2. Dark Transformation Active
3. Death and Decay
4. Scourge Strike
5. Blood Boil + Icy Touch if BB and FF runes up
6. Death Coil on Sudden Doom
7. Horn of Winter

Presence: Frost Presence

Spell Priority

You can use this as a guide if you dont want to use the above rotations, shows the actual spell priority you should be using as a unholy DK.

1) Icy Touch & Plague Strike to maintain diseases only!
2) Dark Transformation
3) Scourge Strike 
4) Festering Strike 
5) Death Coil
6) Horn of Winter

Further Reading:
http://www.arenajunkies.com/topic/191453-dk-basics/ – DK Basics
http://www.arenajunkies.com/forum/60-death-knight/
http://wowpopular.com/Death+Knight – Death Knight Builds
http://www.maxdps.com/deathknight/unholy.php – MaxDPS Gear and Enchants – Only has the Unholy