Scarf Modest Hydra faster than pult and 2hko corv+ 4 turns sand to rapid spin with drill and keep fast+Sub Gengar for fairies+Cloyster to kill flying types for Drill+ Trick Sticky Barb Clef to punish Corvknight and Rotom Heat

Hydreigon @ Choice Scarf  
Ability: Levitate  
EVs: 252 SpA / 4 SpD / 252 Spe  
Modest Nature  
- U-turn  
- Fire Blast  
- Dark Pulse  
- Draco Meteor

Clefable @ Sticky Barb  
Ability: Magic Guard  
EVs: 252 HP / 52 Def / 204 SpD  
Calm Nature  
IVs: 0 Atk  
- Trick  
- Wish  
- Protect  
- Moonblast

Hippowdon @ Leftovers  
Ability: Sand Stream  
EVs: 252 HP / 8 Atk / 76 Def / 172 SpD  
Impish Nature  
- Stealth Rock  
- Earthquake  
- Whirlwind  
- Slack Off

Excadrill @ Leftovers  
Ability: Sand Rush  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Rapid Spin  
- Swords Dance  
- Earthquake  
- Iron Head

Gengar @ Black Sludge  
Ability: Cursed Body  
EVs: 252 SpA / 4 SpD / 252 Spe  
Timid Nature  
IVs: 0 Atk  
- Will-O-Wisp  
- Substitute  
- Hex  
- Sludge Bomb

Cloyster @ King's Rock  
Ability: Skill Link  
EVs: 252 Atk / 4 SpD / 252 Spe  
Adamant Nature  
- Shell Smash  
- Icicle Spear  
- Ice Shard  
- Rock Blast