Could I make any changes to the follwing team? ( It's Gen 4 OU)

Question

Heatran @ Leftovers
Ability: Flash Fire
Shiny: Yes
EVs: 176 HP / 80 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Stealth Rock
- Taunt
- Lava Plume
- Flash Cannon

Dragonite @ Life Orb
Ability: Inner Focus
Shiny: Yes
EVs: 160 HP / 252 Atk / 96 Spe
Adamant Nature
- Dragon Claw
- Earthquake
- Extreme Speed
- Roost

Breloom @ Toxic Orb
Ability: Poison Heal
Shiny: Yes
EVs: 160 HP / 184 Atk / 164 SpD
Adamant Nature
- Spore
- Mach Punch
- Seed Bomb
- Thunder Punch

Gengar @ Choice Specs
Ability: Levitate
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Energy Ball
- Focus Blast
- Shadow Ball
- Sludge Bomb

Starmie @ Leftovers
Ability: Natural Cure
Shiny: Yes
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Thunderbolt
- Surf
- Recover
- Rapid Spin

Tyranitar @ Choice Band
Ability: Sand Stream
Shiny: Yes
EVs: 252 HP / 124 Atk / 132 SpD
Adamant Nature
- Crunch
- Earthquake
- Ice Punch
- Stone Edge

I don't plan on adding any defensive pokemon.

Comments

Replace Heatran's taunt, lava plume, and flash cannon with fire blast for more power, earth power to cover rock and fire, and explosion to break certain walls. Give Dragonite 252 Atk/4 Def/252 Spe jolly to outspeed more stuff. Replace its dragon claw and roost with outrage for more power and fire punch to cover ice and steel. Give Breloom 248 HP/252 Atk/8 Spe adamant for more physical bulk and to hit harder. Replace its thunder punch with superpower for STAB. Give Gengar a life orb to switch between attacks. Replace its energy ball and sludge bomb with substitute to stop status move users and pain split to heal. Replace Tyranitar's earthquake and ice punch with pursuit to reliably hit dark-weak Pokemon and superpower to cover dark and steel.

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why are all of your pokemon shiny

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Because he can.

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well thunder punch was for killing a gyarados when it sets up. Fire blast has less pp and burn seems like the play because its -12% health in this gen.  Heatran is basically my stall counter. I like to switch out between mons so if they switch in a steel type  on my outrage, its going to do ****. Energy ball is for catching swamperts and one shotting them while sludge bomb is stab. I will replace ice punch for pursuit but keeping eq to kill metagross and heatran.