Rate competitive teams
Starting with mine, I have:

EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Destiny Bond
- Sludge Bomb
- Shadow Ball
- Taunt

Blissey (F) @ Leftovers
Ability: Natural Cure
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
- Healing Wish
- Flamethrower
- Seismic Toss
- Aromatherapy

Skarmory @ Rocky Helmet
Ability: Sturdy
EVs: 252 HP / 252 Def / 4 Spe
Impish Nature
- Stealth Rock
- Whirlwind
- Brave Bird
- Steel Wing

Cloyster @ Focus Sash
Ability: Skill Link
EVs: 252 SpA / 252 Spe / 4 HP
Jolly Nature
- Shell Smash
- Icicle Spear
- Rock Blast
- Ice Shard

Tentacruel @ Black Sludge
Ability: Liquid Ooze
EVs: 252 HP / 252 SpD / 4 Spe
Bold Nature
- Knock Off
- Rapid Spin
- Scald
- Blizzard

Azumarill @ Sitrus Berry
Ability: Thick Fat
EVs: 252 HP / 252 Atk / 4 Spe
Adamant Nature
- Belly Drum
- Aqua Jet
- Play Rough
- Superpower