Speaking of dots, what is the proper course of action to take in the following example:

You have applied a dot that is buffed with raging strike. Raging strikes has faded and the dot is approaching expiration. Your GCD comes up with 1 second left on the DOT. Is it best to delay the GCD in order to get your DOT back up or should you fire off an attack and lose 1.5 seconds of DOT uptime?