This WA requires the following addon: https://www.curseforge.com/wow/addons/azerite-essence-profiles
It will grey out if you need a tome (i.e. not in rested or no tome active)
1. Save your essence sets with /aep save NAME (e.g. /aep save AOE).
2. Go into the WA > Actions > On Init, change "/aep load set 1" in the code to the name you used.
3. Change the icon and name for the WA to whatever you want it to show.
4. Reload UI so that the WA updates with latest names.