I put together a nifty talent tree, with tooltips I wrote to explain each Blood talent. I explain each talent, saying if its mandatory or not, how good it is for threat.
It looks like this, embedded it in the forum version of my blood tank 3.3.3 post. Click to go through.
I intend to use this tooltip technique to provide insight when we see the Cataclysm beta talent trees, too. I’ve provided the codes needed so members on the pwnwear forums can produce similar things.
In the mean time, it should be particularly helpful for tanks new to, or re-exploring, Blood tanking. Also note we have Vexill’s overall DK tank guide in the forums.