Working on an OU team and this is what I have:

Gyarados-Mega @ Gyaradosite
Ability: Mold Breaker
EVs: 252 Spd / 252 Atk / 4 HP
Adamant Nature
- Waterfall
- Ice Fang
- Earthquake
- Dragon Dance

Heatran @ Leftovers
Ability: Flash Fire
EVs: 248 HP / 252 SDef / 8 Spd
Calm Nature
- Lava Plume
- Stealth Rock
- Roar
- Ancient Power

Talonflame @ Life Orb
Ability: Gale Wings
EVs: 252 Spd / 252 Atk / 4 HP
Jolly Nature
- Swords Dance
- Flare Blitz
- Brave Bird
- Roost

Scizor @ Choice Band
Ability: Technician
EVs: 252 Atk / 252 HP / 4 SDef
Adamant Nature
- Pursuit
- Superpower
- U-turn
- Bullet Punch

Rotom-Wash @ Chesto Berry
Ability: Levitate
EVs: 252 SDef / 252 HP / 4 SAtk
Calm Nature
- Rest
- Hydro Pump
- Volt Switch
- Will-O-Wisp

Mandibuzz (F) @ Leftovers
Ability: Overcoat
EVs: 252 Def / 252 HP / 4 Atk
Impish Nature
IVs: 0 Spd
- Foul Play
- Roost
- Defog
- Taunt

I want a Heatran replacement so I can make the team in game. Any ideas?

Fatal flaws with my team?