Hello there , i just wanted to share a trick i have been doing for a long time. For this you will need;
1. A Rogue specced in combat.
2. Flying mount
3. Somewhat decent gear to kill them
As we know Killing Spree causes enough damage to kill someone in its duration and also it keeps the rogue on the back of the target. Meaning that even when in the air the rogue stays in the back of his target. So how its done :
Fly about 20 yards above the targets head(to compensate for the latency and maybe to activate some trinket)
Click Killing Spree .
If you are geared well enough your target will be dead and you will feel like a flying ninja.