So after looking at the patch notes for 3.08 and being moderately unimpressed with how my DK was tanking Old Kingdom yesterday, I've come up with some new rotations for my Frost DK's Tanking. For Multi-target pulls:

Code:
0 - Icy Touch
1.5 - Plague Strike
3 - Pestilence
4.5 - Blood Boil
6 - Howling Blast
7.5 - Howling Blast
9 - Frost Strike
10.5 - Frost Strike
12- Repeat
By the time the second howling blast goes off, I should have 85 Runic Power to fuel the 2 Frost Strikes (Chill of the Grave included in there).

For single target tanking:

Code:
0 - Icy Touch
1.5 - Plague Strike
3 - Blood Strike
4.5 - Blood Strike
6 - Obliterate
7.5 - Obliterate
9 - Frost Strike
10.5 - Frost Strike
12- Repeat
Should provide the same runic power as above. Is this ideal, or is there a better way to be doing this?