![overkill meaning overkill meaning](https://i.pinimg.com/736x/5b/c9/05/5bc905c9437ed7f5d39940a14226b131.jpg)
Coupled with Vigor, you're looking at a nice fix to the change of the regen mechanics. This is the reason it is a 31 point talent, and not higher in the tree, so that Combat and Subtlety can get their hands on it. Now, with Overkill, you save 20 energy for 6 seconds, effectively giving you that 20 extra energy that you lost from the change to the mechanics. Since the change of the mechanic left a lot of Rogue's unhappy due to the fact that they couldn't get that extra 20 energy after the opener, Blizzard had to do something to appease the masses. Of course this issue happened with more than just Sinister Strike, so I'm just using that as an example. But over time, that's a lot of time wasted on nothing but white auto hits, no special abilities, as 2 seconds adds up. Of course it doesn't matter so much in a short, burst fight. The reason they changed the mechanics, was due to the fact that often times a Rogue would be at 39 energy, and had to wait for 2 seconds before being able to use Sinister Strike, which required 40 energy with Improved Sinister Strike, which is highly inefficient in a long battle. With the change to the energy ticks, it constantly regenerates at 1 energy per 0.1 seconds, or 10 energy per second, or 20 energy every 2 seconds, which is exactly the same as the values with the previous mechanic. Previously, a Rogue could time his strike right before an energy tick, and effectively get 20 energy right after his/her chosen opener. With the change to energy and mana regen mechanics, this talent bridges the gap between the new mechanics, and the old mechanics.
![overkill meaning overkill meaning](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/kh2aora96rupg40br9u0.png)
Its not THAT good, especially for a 31 pt talent.