Just a quick note to add that my guide to quit randomly mashing buttons and learn to kill things with your Death Knight (or for a less-unwieldy title, the guide to lrn2deathknight) has been updated to incorporate both reader suggestions and comments as well as my own experiences. You may want to take a second look - 2 round rotations have been added, incorporating exactly how the ability of every tree to create Death Runes allows you to switch things up a bit.