I want to build an gen VI team around my bro.

On showdown, I run with

Arcanine (M) @ Life Orb
Ability: Flash Fire
EVs: 72 HP / 252 Atk / 8 SDef / 176 Spd
Adamant Nature
- Flare Blitz
- Extreme Speed
- Crunch
- Close Combat

Roserade @ Life Orb
Ability: Natural Cure
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature
- Leaf Storm
- Sludge Bomb
- Sleep Powder
- Rest

Rhyperior (M) @ Leftovers
Ability: Solid Rock
EVs: 248 HP / 16 Atk / 244 SDef
Adamant Nature
- Stealth Rock
- Earthquake
- Stone Edge
- Dragon Tail

Crobat (M) @ Black Sludge
Ability: Inner Focus
EVs: 176 HP / 192 Atk / 4 SDef / 136 Spd
Jolly Nature
- Brave Bird
- Taunt
- Roost
- U-turn

Nidoking @ Life Orb
Ability: Sheer Force
EVs: 252 SAtk / 4 SDef / 252 Spd
Timid Nature
- Earth Power
- Fire Blast
- Ice Beam
- Substitute

Heracross @ Choice Scarf
Ability: Moxie
EVs: 252 Atk / 252 Spd / 4 Def
Jolly Nature
- Close Combat
- Megahorn
- Stone Edge
- Earthquake

However, since there aren't any restrictions in game, are there are any upgrades I can make?