Fast question about blood fury + cast spell macro

Hi i just wanted to ask if it is worth having a macro like this:
/assist focus
/cast Blood Fury
/StopCasting
/cast lightning bolt

or should i just put Blood fury in another button to avoid the StopCasting to cancel casts if spamming the button? or is it somehow possible to make a cooldown macro that wont stopcast if Blood fury is on CD? and is that kind of macro allowed to use in wow?

just take out /stop casting, i have the same macro without the stop casting and i have /use 13 and /use 14 in my macro also and it will use blood fury and my trinkets when they are avaliable and since they dont have a casting time or world cooldown then you start casting lightning bolt as soon as you hit the macro.

my macro looks like this:
/assist <name>
/cast Blood Fury
/use 13
/use 14
/cast Lightning Bolt

thanks :)