Please rate my Gen 7 OU team

Question

Soooo I realised that Rayquaza is banned in OU. I’ve won quite a lot on Pokémon Showdown with this team but it can probably be improved so tell me plz.

Greninja @ Salac Berry
Ability: Protean
EVs: 252 SpA / 252 Spe
Mild Nature
- Hidden Power [Dragon]
- Gunk Shot
- U-turn
- Dark Pulse

Ferrothorn @ Rocky Helmet
Ability: Iron Barbs
EVs: 252 HP / 252 Atk
Brave Nature
- Stealth Rock
- Curse
- Gyro Ball
- Shadow Claw

Serperior @ Life Orb
Ability: Contrary
EVs: 252 SpA / 252 Spe
Rash Nature
- Leaf Storm
- Dragon Pulse
- Hidden Power [Fire]
- Giga Drain

Kyurem @ Assault Vest
Teravolt Ability
EVs: 252 SpA / 252 SpD
Rash Nature
- Dragon Pulse
- Signal Beam
- Shadow Ball
- Flash Cannon

Porygon-Z @ Life Orb
Ability: Adaptability
EVs: 252 SpA / 252 Spe
Timid Nature
- Shadow Ball
- Signal Beam
- Blizzard
- Thunderbolt

Gyarados @ Gyaradosite
Ability: Moxie
EVs: 252 Atk / 252 Spe
Adamant Nature
- Waterfall
- Earthquake
- Outrage
- Dragon Dance

Comments

Could you try and use the Pokémon showdown syntax? Like this:
Lycanroc @ Focus Sash
Ability: Steadfast
EVs: 4 HP / 252 Atk / 252 Spe
Jolly Nature
- Rock Tomb
- Endeavor
- Stealth Rock
- Taunt


You can click “import/export” on your team and copy-paste all the sets with the showdown-improbable syntax here

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You can add 4 more EVs to every Pokemon you have. Your spreads are a little odd on some Pokemon. Serperior needs Timid, not Rash. Glare or Substitute is probably a better choice than Giga Drain. Download is better than Adaptability on Porygon-Z. Kyurem, Greninja, and Ferrothorn all have questionable sets, but I don't know enough about Gen 7 OU to criticize those.

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Thx for the help. The reason I put hp dragon on greninga is because I wanted it to become a dragon type if necessary but thx for the nature + moves for serperior

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HP Dragon isn't good. It is outclassed by other moves and HP types.

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Why is signal beam on Kyurem? It’s not coverage nor stab so why is it there?

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I really have no idea maybe I should’ve put ice beam instead