SM OU Climbed from the bottom to 1400 ELO with this team- Any notable flaws I can fix?

[aemulator]

Landorus-Therian @ Choice Scarf
Ability: Intimidate
EVs: 240 HP / 252 Atk / 16 Spe
Impish Nature
- Hidden Power [Ice]
- Earthquake
- Stone Edge
- U-turn

Tyranitar @ Tyranitarite
Ability: Sand Stream
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Stealth Rock
- Stone Edge
- Crunch
- Earthquake

Zapdos @ Leftovers
Ability: Static
EVs: 248 HP / 8 Def / 252 Spe
Timid Nature
IVs: 0 Atk
- Roost
- Heat Wave
- Hidden Power [Ice]
- Discharge

Toxapex @ Black Sludge
Ability: Regenerator
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Scald
- Recover
- Haze
- Toxic Spikes

Excadrill @ Life Orb
Ability: Sand Rush
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Rapid Spin
- Swords Dance
- Rock Slide

Latios @ Psychium Z
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Calm Mind
- Psychic
- Roost


So far, my winrate with these guys have been really good. I find Latios can often be baggage, but other then that, most everyone has carried their weight. I'm at 1400 now (if you want to verify, my showdown is the same as my user), any tips on how I can improve it without making drastic changes to a formula that's been working for me so far?

 

[IronBullet]

Welcome to Smogon! I'm locking your RMT for the time being as the forum rules require that you provide in-depth 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.