I don't get why everyone under the sun swears by Dancing Rune Weapon. I worked it into my rotation and got less DPS than when I was just hammering Death Coil, so I can say I tried it and dropped it.
However I have newly discovered Hysteria, and that is pretty awesome for basically a 30 sec single target Blood Lust.
Keep in mind the build you use also has to work for you. I can't play Frost, and it's because I leveled Blood DPS and having Frost Strike be a Rune dump screws me up. I might try Frost DPS in the near future, but right now I'll stick with what I know.