Won't effect performance, but the untrigger here is unecessary
#Best way to show and hide another WA?
magic flame
the default behaviour is already to hide on a falsey value from the trigger if there is no untrigger specified
if you want to communicate between auras, this is the way to do it
Make sure you're only sending events on state changes of course
ScanEvents isn't free
You should keep track of when state changes, and only send events then.
You should also look into using the proper events, or throttling if there are none for what you're trying to do
!events
craggy bayBOT
See this message for info on tracking the various game events fired by the API
<#pins message>
magic flame
And there are snippets for throttling every frame in the in-game editor
You can look at C_Timer as well if you only need to poll a few times a second. But it's a little more work to configure.
That's about all I can suggest without knowing more about what you're trying to do 🙂
Oh god
Not this one again
Does hekili not work on wotlk?
There must be one of the rotation helper addons that does
This aura needs an exorcism
I can't suggest anything else for this one 
lean root