I played around with your Macro, but couldnt get it to work properly for me. So i made my own inspired by yours. I have never made one before.
The changes you made, you lose the single target rotation by adding in another ‘Crash Lightning’.
Crash Lightning is for AOE. The macro is designed to do it for you. Remember, when you change
targets, crash ligtning will cast again.
Also, its not a good idea to put [combat] in front of every cast. Especially your Rockbiter.
Because that is your Meilstrom builder..
The original version works VERY well in Mythic+. Good Luck and enjoy!