Talent Calculator - World of Warcraft
That right there is almost identical to the tree I use, and it works like a champ with the following rotation. Obviously, use cooldowns and dump RP as needed.
DnD, HB, BB
HB, Ob, BS x2
Repeat steps two and three as needed.
For bosses, start with step two.
This rotation's almost like putting your toon on cruise control in it's brainless meatshieldism, but like I said, it works like a champ. If you can afford to dual-spec, use your secondary spec to experiment with other builds until you find one you like most. I have, and this turns out to be one of my favorite, not due to the lethargic ease, but rather the playstyle. When everything procs, it's one of the most fun builds of any class I've ever played. Also, it's not uncommon for this build to hit 4k DPS on trash in Naxx10, even in tank gear. Fun stuff.
...Thoughts of a philosophical Death Knight...
If death is the inevitable end of life, is life the inevitable end of undeath?