Final BiS For Wrath of the Lich King (Ruby Sanctum 25 Heroic loot included)
You'll probably notice icewalker enchant on feet rather than nitro boosts. Because it is a purely stationary single target dps simulation (no movements at all, e.g. Saurfang jr. fight).
Now, there is only one absolute BiS for an orc, but there are 2 BiS lists for every other race. If you're not an orc, you'll probably need to download kahorie's dk simulator with my work on it at the bottom of the page (It has everything covered, 2nd and 3rd BiS list, Intro and Priority system, et cetera) implement latency/runic power gain and see if you should use 2nd or 3rd list.
(The higher the personal latency and/or external runic power gain, the higher the value of expertise is)
Download Kahorie's DK Simulator 184.108.40.206 - Latency test.rar