Try to heal or try to do pvp .... you just cant avoid this ... i have casting bar that disappear, ista heal or shields that start 1-1.5 sec after i push button, or in wroste case they dont even fire up ...
i start to avoid pvp because i only get nervous.... this isnt just a matter of little dps this just breaking my gameplay....
If u are hitting only normal mob .. you dont notice this too much ... (if you dont switch target too often XD) but i dotn keep paying only for this