Killing Machine itself is awesome. Subversion Subversion is a cornerstone of many a DPS build, thanks to the threat reduction. While threat reduction seems a bit laughable in the era of quick-and-frantic AoE DPS runs where it seems like most tanks can keep aggro by spamming a few buttons about wow gold, it can come in handy, especially at later gear levels where DPS attack power starts to drastically outpace a tank's ability to keep aggro.

As a general rule of thumb, it's probably safe to take one point out of Killing Machine some time after you reach 30-40% critical strike chance, but your mileage may vary. When you remove that point, it can easily go into either Black Ice or Subversion. Blood-Caked Blade While this is the easiest place to remove points if you want to bolster Black Ice or Subversion, it's also the best place to put points back into if you want more DPS. Frost DPS does a whole lot of damage via wow gold weapon strikes, and a wow gold chance to do more damage on each strike is nothing to sneeze at. If you have no threat issues, just take those points out of Subversion and put them here. It's going to be the best place to spend them if you want more DPS.

That said, Subversion is not great for frost DPS. We generally get enough crit power from Killing Machine and gear. If you don't need the threat reduction, you should take the points out of it. A free crit every so often is extra DPS in the bank. That said, there is too much of a good thing. If you don't use the Killing Machine buff, that's wasted talent points. If you have so much critical strike rating that many of your hits wow gold are critical strikes anyway, you may be wasting talent points.