Deoxys-S/Deoxys-D
Ability: Pressure
-Magic Coat
-Taunt
-Stealth Rocks/Spikes
-Psycho Boost/Spikes
Driftblim
Ability: Aftermath
-Defog
-Baton Pass
-Shadow Ball
-Substitute/Thunderbolt/Calm Mind/Stockpile/Tail Wind
Terrakion
Ability: Justified
-Sacred Sword
-Rock STAB
-Earthquake
-Rock Polish/Swords Dance/X-Scissor/Superpower
Driftblim is the only Ghost that can learn Defog, thus making it the only pokemon that can block both forms of hazard removal. The Deo forms are the best hazard setters in standard, and here also have the ability to block Taunt and Magic Coat, making it even more likely they can get up Spikes and SR. However, they share a weakness to Dark type moves, making them vulnerable to things like Mandabuz, Blastiose-Mega, and various Pursuit trappers. This is where our Justified user comes in. They can sponge a predicted Dark type move, and retaliate at +1. Sacred Sword is used for it's low distribution, and gains great coverage along side Rock type STAB. Earthquake is for Aegislash and protecting against your opponents prediction. Superpower is an option for people who really want to a safe switch into Tyranitar. Other Justified Pokémon could be used instead, but Terrakion is the only Pokemon with Sacred Sword that isn't walled by Aegislash. Virizion deals far better with Blastiose-M however, so it could be a viable alternative, or even teamate.