Unholy ?fun with WoW 4.0.1 patch Death Knight

Missing dancing tonight after a cold hit my chest so that breathing hurts... I decided to spend the pre-sleep evening choosing a talent build for my death knight. While exploring the advice out there I had to battle my aversion to the whole persona of a death knight.

The talent tree summaries only helped by [probably] eliminating Blood, because I'm not really comfortable with a tanking role. Still left Frost and Unholy. I would avoid Unholy because it just sounds icky, but I felt I needed a more thoughtful reason.

Guide4wow helped me out by identifying, in their opinion, Unholy as the faster levelling build... and I'm still levelling.

I still needed advice with a rotation. Many months ago when I last played the dk, I never did gain any certainty over which spells/attacks to use. In this I've taken initial advice from Vraagar's lens: Unholy Death Knight DPS Guide and Death Knight Builds.

For my own future reference because who knows when I'll actually play this toon, and by then I'll have lost the links to the above advisers, and will have forgotten what their abbreviations mean, the plan is:

For solo targets/victims (check in Unholy Presence):

1. (I won't always start with this, but then 1 is never in my typical rotation) Neither adviser mentioned Death Grip but I have it at 1 on my action bar just because it was there before and I think I had a good reason for it, but I'm open to advice against that.
2. "Diseases Up" apparently means attack with Icy Touch (for the disease Frost Fever) ...
3. ...and Plague Strike (for disease Blood Plague)
4. Dark Transformation [?if] Active
5. Scourge Strike (U F) [I guess that means it needs an Unholy and a Frost Rune although the game says just an Unholy]
6. Festering Strike (B F) [needs Blood & Frost Rune]
7. Death Coil on Sudden Doom proc [Sudden Doom is an unholy talent, maxed at 15% chance to occur from auto attacks - making Death Coil not cost runic power]
   
8. Mr 12 uses Obliterate after diseases, but he is a Frost Death Knight.
9. Mr 12 doesn't advise using Rune Strike 

AoE Rotation (switch to Frost Presence)

• Mouse click Horn of Winter [ DKB advised this at end of rotation, but as it lasts 2 minutes I don't really understand why not to start as strong as possible]

1. No Death Grip in this case
2. Diseases ...
3. ...up and spread to everything with 
• Pestilence
4. Dark Transformation [?if] Active
• Death and Decay
5. Scourge Strike
• Blood Boil
6. Festering Strike if BB and FF runes up.
7. Death Coil on Sudden Doom proc

All that other fun stuff I have no idea - use the anti-magic, anti-spellcaster stuff if fighting a spellcaster I guess, but when to use Blood Strike or Death Strike, or Gargoyle - {shrugs}