Ah.
Well, there's been some changes in 3.1, Steewe. I guess Blizzard thought it was unbalanced that Frost would have two tanking CDs, and Lichborne no longer increases chance to be missed - keeps the immune and breakage of some debuffs, but it no longer helps us avoid damage.
And, from my expierence as a Frost Tank, I usually have just enough Runic Power to keep my RP skills up and running; that Chill of the Grave is going to generate more then enough Runic Power for me.

