Delphox (F) @ Life Orb
Ability: Blaze
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 29 HP / 0 Atk
- Calm Mind
- Fire Blast
- Psyshock
- Grass Knot

Cobalion @ Leftovers
Ability: Justified
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Close Combat
- Iron Head
- Substitute

Rotom-Mow @ Choice Scarf
Ability: Levitate
EVs: 8 HP / 252 SpA / 248 Spe
Timid Nature
IVs: 0 Atk
- Volt Switch
- Leaf Storm
- Thunderbolt
- Trick

Flygon (M) @ Life Orb
Ability: Levitate
EVs: 4 Def / 252 SpA / 252 Spe
Timid Nature
- Draco Meteor
- Earth Power
- Fire Blast
- Defog

Seismitoad (M) @ Leftovers
Ability: Water Absorb
EVs: 192 HP / 252 SpA / 64 Spe
Modest Nature
IVs: 0 Atk
- Stealth Rock
- Hydro Pump
- Earth Power
- Sludge Bomb

Durant (M) @ Life Orb
Ability: Hustle
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- X-Scissor
- Iron Head
- Superpower
- Thunder Fang

More of an offensive team that's designed to allow CM Delphox or SD Cobalion to sweep. As Cobalion and Delphox have rather different counters, using this team comes down to deducing what the opponent is better prepared for. Rotom-C is the team's revenge killer and is a late-game cleaning option if the opportunity arises. Flygon provides Defog support on top of being able to weaken some physical walls pretty easily. Not to mention it lures in Fairies for Delphox to set up on. Seismitoad absorbs Water attacks and can deal some decent damage. Sludge Bomb is nice for quickly wearing down Tangrowth, which can be a challenge for Cobalion to get past if it can't get a Sub up. Durant rounds out the team by being the only pure wallbreaker on the team. Thunder Fang is really cute for luring in and significantly damaging Jellicent. As Durant attacks right off the bat, it's also nice for just catching stuff off guard in general. As for other options, you can use Psychic + Dazzling Gleam on Delphox for more reliability vs. Scrafty and Spiritomb. Seismitoad can utilize Toxic for a slower way of dealing with Fairies and bulky Waters. Flygon can be turned around as a physical Scarf user with Outrage, EQ, and U-turn filling Draco, EP, and Fire Blast respectively. In this case, you should turn Rotom-C into a Specs user with the same moves and EV spread. Speaking of, Rotom-C's EV spread seems strange but is very simplistic. Underspeed opposing Rotom-C's to keep switch advantage. Just don't get caught having to outspeed an opposing Rotom-C to win the game lol.