Help me with my Monotype Ground Team

[DarkLordDarkraiYT]

This is my team so far:
Hippowdon (M) @ Groundium Z
Ability: Sand Force
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Earthquake
- Ice Fang
- Sandstorm
- Stone Edge
Garchomp (M) @ Garchompite
Ability: Sand Veil
EVs: 4 HP / 252 Atk / 252 Spe
Naive Nature
- Earthquake
- Dragon Claw
- Poison Jab
- Fire Blast
Excadrill (M) @ Assault Vest
Ability: Sand Rush
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Earthquake
- Rock Slide
- Iron Head
- Shadow Claw
Gastrodon (M) @ Leftovers
Ability: Storm Drain
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Recover
- Toxic
- Earthquake
- Scald
Nidoking (M) @ Life Orb
Ability: Sheer Force
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Flamethrower
- Thunderbolt
- Earth Power
- Ice Beam
Landorus @ Life Orb
Ability: Sheer Force
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Gravity
- Earth Power
- Focus Blast
- Sludge Wave
Is there anything I can do to improve my team?

 

[Moosical]

Hi there, welcome to Smogon. This is the wrong place to request a rate. If you would like an official rating of your team, please post this type of thread here: https://www.smogon.com/forums/forums/sm-other-teams.410/ . Please be sure to read the rules of the RMT forum before doing so: https://www.smogon.com/forums/threads/rmt-rules-and-forum-guidelines.3647102/.