Your individual class discords may already have a section for weakauras, or links to sites that do. check it out.
Class Discord Servers:
Death Knight:
https://goo.gl/hTGRQ8
Demon Hunter (Mardum):
https://goo.gl/q6ZYuT
Demon Hunter (The Fel Hammer):
https://goo.gl/LI6IQs
Druid:
https://goo.gl/Lmevft
Hunter:
https://goo.gl/Xz4azW
Paladin:
https://goo.gl/eSGLlY
Priest:
https://goo.gl/cBq36L
Rogue:
https://goo.gl/bX8Lna
Shaman:
https://goo.gl/TacuSF
Mage:
https://goo.gl/TbJGKK
Monk:
https://goo.gl/Xux6GA
Warlock:
https://goo.gl/7PH6Bn
Warrior:
https://goo.gl/KO1MXR