It's not a bolt spell or an area of effect spell. It's a simple ray that has short range and has to hit the target for it to take effect, like the some of the heal other spells. With the patch, they are instant casting, so you can do alot of damage in a short amount of time if you are near a caster. Instrument set up a macro that will cast all 7 of his rays with the push of a button in a matter of a couple of seconds.