Sinister Strike is a core rogue ability learned at level one. It is a combat ability that deals a large percentage of weapon damage. You must have a melee weapon to perform. This move's relatively low energy cost coupled with its excellent damage make it one of the most important tools in the rogue's combat arsenal.
Although positioning isn't a requirement for using Sinister Strike, it is still recommended that you try to position yourself behind the mob you are attacking, as attacks from behind cannot be blocked or parried.
It is recommended that you use a weapon with the highest average damage that you can attain for your main hand when using Sinister Strike, as the damage from Sinister Strike is calculated from a range between your weapon's minimum and maximum damage.