When activated, this ability immediately finishes the cooldown on all Hunter abilities with a base cooldown less than 5 minutes.
Readiness is a hunter ability learned at level 60. When activated, it immediately finishes the cooldowns on hunter abilities with a base cooldown of less than five minutes.
Since Readiness resets the cooldowns of [Kill Command] and [Rapid Fire] and these abilities do not trigger a global cooldown, there is no reason not to use them before using Readiness. It may be useful to make a macro for Readiness that uses these abilities immediately before Readiness.
Readiness can be used to reset the cooldown on [Deterrence], allowing the ability to be used twice in a row for a total of 12 seconds of nigh invulnerability. This can be situationally useful in both PvE and PvP.
Using Readiness together with [Disengage] will let you to leap twice in a row, allowing you to put a lot of distance between you and your enemy. This can be especially useful if you are attacked by higher level players while questing, as it may buy you enough time to use [Feign Death] (to clear combat) and mount up before they can catch up to you.