Rate my OU team please

Question

Clefable @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 252 SDef / 4 SAtk
Calm Nature
- Stealth Rock
- Soft-Boiled
- Flamethrower
- Moonblast

Specially defensive wall and rock setter

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Keldeo @ Choice Specs
Ability: Justified
EVs: 252 Spd / 252 SAtk / 252 SDef
Timid Nature
- Scald
- Hydro Pump
- Hidden Power [Electric]
- Secret Sword

Fast special sweeper

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Landorus-Therian (M) @ Assault Vest
Ability: Intimidate
EVs: 252 Atk / 252 HP / 4 SDef
Adamant Nature
- Earthquake
- Knock Off
- U-Turn
- Stone Edge

Specially defensive physical sweeper

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Latias (F) @ Life Orb
Ability: Levitate
EVs: 252 SAtk / 252 HP / 4 SDef
Modest Nature
- Defog
- Roost
- Draco Meteor
- Psychic

Specially bulky atacker and defoger

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Magnezone @ Air Balloon
Ability: Magnet Pull
EVs: 252 SAtk / 252 HP / 4 SDef
Modest Nature
- Flash Cannon
- Hidden Power [Fire]
- Volt Switch
- Thunderbolt

Bulky physical sweeper

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Pinsir @ Pinsirite
Ability: Moxie --->Mold Breaker
EVs: 252 Atk / 128 Spd / 128 HP
Adamant Nature
- Return
- Quick Attack
- Swords Dance
- Earthquake

Physical sweeper with scary STAB priority

Comments

You can change Stealth rocks on the clefable for Calm mind. The guy can sweep.

Ferrothorn @ Leftovers/ Rocky helmet
EVs: 252 Atk/ 252 Hp/ 4 Atk
Impish Nature
Trait: Iron Barbs
Moves:
Stealth Rock, Leech Seed, Protect/ Thunder Wave, Knock Off/ Gyro Ball.

Answer 1

It's good though you have no Physical Wall whatsoever. One pokemon I could recommend using is Scarmory to replace one of the Pokemon with an Ice weakness. You should consider this set:
Scarmory @Leftovers
Ability- Sturdy
EVs 248 HP/4 Att/252 Def
Moves-
-Stealth Rock
-Spikes/Roost
-Brave Bird
-Whirlwind/Spikes

Stealth Rock you know for what.
Spikes same.
Roost is to help you stall better.(Increase its longevity)
Whirlwind is to phase out and get your opponents pokemon to take Stealth Rock damage.

I suppose you could consider removing Latias as you have two Special attackers and this pokemon will help you a lot as your lead.

Thanks for reading.

Comments

you could put 252 HP on skarm. You have 4 more EVs. Though i wouldn't do spikes. Counter is better. He already has a rocks setter.  I  recommend Ferrothorn though because he has more Sp.Def bulk and can slowly drain you Opponents health.
You can change Stealth rocks on the clefable for Calm mind. The guy can sweep.

Ferrothorn @ Leftovers/ Rocky helmet
EVs: 252 Atk/ 252 Hp/ 4 Atk
Impish Nature
Trait: Iron Barbs
Moves:
Stealth Rock, Leech Seed, Protect/ Thunder Wave, Knock Off/ Gyro Ball.

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I just keep seeing special wall, specially bulky. What isn't special. I recommend switching your Clefable for a Garchomp-

Garchomp@Focus Sash
EVs - 4/252/0/0/0/252
Nature - Jolly
Ability - Rough Skin
-Swords Dance/Brick Break
-Stealth Rock
-Dragon Claw
-Earthquake

I use this one on Showdown! and it never fails me. The rest is not extremely good, but it is fine.