CVar maxSpellStartRecoveryoffset

Determines how far ahead of the 'end of a spell' start-recovery spell system can be, before allowing spell request to be sent to the server. Ie this controls the built-in lag for the ability queuing system. Ideally, you'll want to set this to your in-game latency.

Note: For this cvar to work, reducedLagTolerance must be enabled.

Default Setting

 * 0

Possible Settings

 * 0-400

Changing this setting
In-game, type the following /console MaxSpellStartRecoveryoffset setting

Alternatively, you can exit wow, open the Config-cache.wtf file, and add the following line: SET MaxSpellStartRecoveryoffset setting