Putting the EVs for your Pokemon would be helpful.
Infernape: Sometimes Flamethrower's power isn't enough, so you can use Overheat or Fire Blast instead. I personally use Fire Blast since it's the medium between Flamethrower and Overheat. (EVs should be 252 Atk/4 SAtk/252 Spe)
Braviary: If you're using Sheer Force, use Rock Slide. (EVs should be 4 HP/252 Atk/252 Spe)
Scizor: Use U-turn if you're using Choice Band for scouting. (EVs should be 248 HP/252 Atk/8 Spe and the ability should be Technician)
Electivire just isn't cutting it this generation. Eelektross could be a better alternative:
-Grass Knot/Brick Break
-Dragon Claw/Hidden Power (Ice)
EVs: 252 Atk/212 SAtk/44 Spe or 212 Atk/252 SAtk/44 Spe
A Mild nature pretty much ruins Intimidate's usefulness. Use a Rash or Naive nature with:
-Dragon Pulse (since you bred it in Gen V)
EVs: 116 Atk/216 SAtk/176 Spe
Item: Life Orb
Starmie: Use a Timid nature and Surf or Hydro Pump/Thunderbolt/Ice Beam/Psyshock. (EVs should be 4 HP/252 SAtk/252 Spe)
Garchomp: You can probably fit in Swords Dance somewhere on Garchomp (over Dragon Claw) so it can hit harder
Use Pursuit and Fire Punch on Tyranitar.