SM OU What should i add for my last member and what should I change

[HowlingMeteor]

Need help please

Shrapnel (Haxorus) (M) @ Life Orb
Ability: Mold Breaker
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Poison Jab
- Iron Tail
- Outrage
- Dragon Dance

Helios (Volcarona) (M) @ Lum Berry
Ability: Swarm
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Heat Wave
- Quiver Dance
- Bug Buzz
- Whirlwind

Eden (Serperior) (M) @ Leftovers
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Leaf Storm
- Glare
- Hidden Power [Fire]
- Substitute

Scarlet (Toxapex) (F) @ Black Sludge
Ability: Regenerator
Shiny: Yes
EVs: 252 HP / 4 Def / 252 SpD
Calm Nature
IVs: 0 Atk
- Toxic Spikes
- Recover
- Scald
- Haze

Tank (Tyranitar-Mega) (M) @ Tyranitarite
Ability: Sand Stream
EVs: 252 HP / 4 Atk / 252 SpD
Careful Nature
- Stone Edge
- Crunch
- Protect

 

[737373elj]

...
Each member of the team requires a description that includes your reason for choosing that Pokémon, the Pokémon's role on that team, and a short description of its set. This is to help raters get an idea of what each member of the team does and will help them when trying to suggest changes to improve the team. We expect at least 3 lines of descriptions on desktop for each member. The better the descriptions, the easier it is for raters to understand your team and its members.

That’s the rules.

And by actually adding descriptions to your Pokemon, it helps raters identify your weaknesses and so on.

 

[maroon]

Hi, welcome to Smogon! I'm locking your RMT for the time being as the forum rules require that you provide at least 3 lines of descriptions for each Pokemon to explain their roles. Please read the rules carefully and take a look at Team Showcase to see the level of detail we require. PM me with updated descriptions and I'll be happy to unlock this.

Additionally this forum is not for building teams but rather editing them. In the meantime here are a few OU Resources for you to look at-
Sample Teams: https://www.smogon.com/forums/threads/usm-ou-sample-teams-v2-up.3638845/
Viability Rankings: https://www.smogon.com/forums/threads/usum-ou-ultra-viability-ranking-thread.3621329/