Oh wise men of /vp/ please tell this small noob what to improve in this team for doubles.

Garchomp @ Yache Berry
Ability: Sand Veil
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature
- Outrage
- Poison Jab
- Earthquake
- Swords Dance

Tyranitar @ Assault Vest
Ability: Sand Stream
EVs: 252 HP / 252 Atk / 4 SAtk
Naughty Nature
- Crunch
- Pursuit
- Flamethrower
- Brick Break

Lucario @ Lucarionite
Ability: Justified
EVs: 252 SAtk / 252 Spd
Timid Nature
- Aura Sphere
- Vacuum Wave
- Flash Cannon
- Nasty Plot

Mamoswine (M) @ Focus Sash
Ability: Thick Fat
EVs: 252 Atk / 4 Def / 252 Spd
Jolly Nature
- Ice Shard
- Earthquake
- Icicle Crash
- Protect

Aegislash @ Leftovers
Ability: Stance Change
- King's Shield
- Shadow Sneak
- Sacred Sword
- Swords Dance

Aron @ Shell Bell
Ability: Sturdy
Level: 1
Shiny: Yes
- Endeavor