Fast Casting

Overview
Fast Casting is an effect that is gained when the recipient gains more than +100% casting speed increases from buffs, debuffs or other methods.

Fast Casting allows spells that would otherwise have a cast time, to be used instantly.

Gaining Fast Casting
when the recipient gains more than +100% casting speed increases from buffs, debuffs or other methods. Fast casting will be immediately lost if the user drops under +100% casting speed.

Certain abilities that grant Fast Casting grant at least +100% casting speed. Silence overrides fast casting and will always stop a user from casting. See the Silence page for more information on silences.

Fast Casting During Casts
During normal casts, fast casting will simply remove the casting requirement and allow the spell to be cast instantly, while moving. Cooldowns and Global cooldowns activate normally.

Fast Casting During Instant Casts
Fast Casting has no effect on instant casts.

Fast Casting During Channels
During Channeled casts, fast casting will cause the channel will have its channel time and ticks capped at a minimum to allow for the full channel effect to be rapidly cast. Channel ticks are capped at 0.1 seconds and the channel time is capped at ticks * 0.1 seconds. Additionally all channeled casts receive a small buffer at the end of the cast to allow the cast to complete (tick rate/1.25)

A channel with a 2 second duration with 4 0.5 second ticks will be reduced to (0.1 * 4) + 0.1/1.25) or 0.408 seconds

Fast Casting and Global Cooldowns
Fast Casting does not directly affect global cooldowns, instead the passive casting speed increase reduces the global cooldown to its cap of 0.4 seconds.