In the prepatch, Blizzard has buffed Unholy Death Knight mastery to also increase our minion damage. This has a really solid effect on the trait
Last Surprise (which makes
Army of the Dead and magus minions explode upon death). The trait is Shadow damage, but also performed by your pet. This means it will be able to benefit twice from
Mastery: Dreadblade. Even with a 50% PvP nerf, two Unholy Death Knights can easily one shot the whole enemy team!
Other than stacking Mastery, we are also taking advantage of
Unholy Blight giving minion damage increase, as well as
Necrotic Aura and
Decomposing Aura (to increase our damage and reduce the enemies maximum HP)
The most important thing is to time your
Apocalypse with your partner, since you want all the ghouls to spawn instantly. Keeping the enemy close to the detonation shouldn't be too hard thanks to double
Death Grip!
The
Army of the Damned talent is really solid, since it gives you a
Magus of the Dead that expires at the same time as the rest of your ghouls. Do keep in mind that you want the pet on passive, otherwise the magus starts casting far away from the enemy...
You can also spawn a
Magus of the Dead that has a 20 second duration with Abomination (and the Azerite Trait) but we decided to go for more survival thanks to
Dome of Ancient Shadow!