At Level 100, we recommend that you take the talent Unholy Frenzy. If you choose to take this talent over the other 2 options, then we recommend switching your Level 57 talent to Bursting Sores due to the great AoE synergy between these 2 talents. If you choose to use the talent Army of the Damned, which is an easier talent to play with, then we recommend staying with the Level 57 talent Ebon Fever.
Edit 20 It’s been a week since this post and a lot of people are still reaching out to me with questions which is fine. I have had a few different people reach out to me to help make YouTube videos based off this guide and more info in BFA which I’m more than willing to do. Whoever gets the videos up first I will link them here for you guys to enjoy.