Garchomp @ Choice Band  
Ability: Rough Skin  
Tera Type: Dragon  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Outrage  
- Earthquake  
- Poison Jab  
- Scale Shot  

Corviknight @ Maranga Berry  
Ability: Pressure  
Tera Type: Flying  
EVs: 252 HP / 40 Def / 16 SpD / 200 Spe  
Impish Nature  
IVs: 0 Atk  
- Body Press  
- Iron Defense  
- Roost  
- Taunt  

Darkrai @ Choice Specs  
Ability: Bad Dreams  
Tera Type: Dark  
EVs: 4 Def / 252 SpA / 252 Spe  
Timid Nature  
- Dark Pulse  
- Ice Beam  
- Thunder  
- Focus Blast  

Garchomp hits hard with choice band, using scale shot to beat substitute / haban users. Corviknight beats primarina and regidrago and can pressure stall many attackers with roost. Darkai hits hard with choice specs, using ice beam for both landorus, thunder for corviknight and some primarina and focus blast for most ursaluna.