Dragapult @ Choice Specs  
Ability: Infiltrator  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Draco Meteor  
- Shadow Ball  
- Fire Blast  
- Thunderbolt

Aegislash @ Choice Specs  
Ability: Stance Change  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
- Shadow Ball  
- Flash Cannon  
- Steel Beam  
- Shadow Sneak

Gengar @ Choice Specs  
Ability: Cursed Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Shadow Ball  
- Sludge Wave  
- Focus Blast  
- Thunderbolt