Steel Monotype OU [advices]

Titanium (Metagross) @ Occa Berry
Trait: Clear Body
EVs: 248 HP / 252 Atk / 8 Spd
Adamant Nature
- Stealth Rock
- Meteor Mash
- Earthquake
- Bullet Punch

IronBird XII (Skarmory) (M) @ Leftovers
Trait: Sturdy
EVs: 252 HP / 232 Def / 24 Spd
Impish Nature
- Roost
- Spikes
- Whirlwind
- Brave Bird

Landmine (Ferrothorn) (F) @ Choice Band
Trait: Iron Barbs
EVs: 248 HP / 252 Atk / 8 SDef
Brave Nature
- Gyro Ball
- Power Whip
- Bulldoze
- Payback

FuriosX (Scizor) (M) @ Leftovers
Trait: Technician
EVs: 252 HP / 40 Atk / 216 SDef
Adamant Nature
- Bullet Punch
- Bug Bite
- Swords Dance
- Roost

MAGNETTT (Magnezone) @ Choice Scarf
Trait: Magnet Pull
EVs: 252 SAtk / 252 Spd / 4 HP
Timid Nature
- Thunderbolt
- Flash Cannon
- Hidden Power [Fire]
- Volt Switch

Volcano (Heatran) (M) @ Air Balloon
Trait: Flash Fire
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature
- Fire Blast
- Earth Power
- Hidden Power [Ice]
- Taunt

Team looks good, though I'd suggest a 252 HP/96 Atk/160 Spe spread for Metagross to help it take special moves more easily.

The preferred EV spread for Skarmory now is 224 HP/252 Def/32 SDef to give it an optimal Leftovers number while taking the least amount of Stealth Rock damage. Wobbuffet isn't that common either.

A neutral STAB Gyro Ball still outdamages a supereffective Payback (if Ferrothorn moves last). The last slot should go to Spikes (to catch the opponent off-guard that Ferrothorn is using the standard defensive set) or Explosion (to go out with a bang).

I think you should replace Ferrothorn with a Lucario, Jirachi, or even Cobalion. You're using Ferrothorn as an attacker which it really shouldn't be used as, because it's stats are more defensively based. If you don't want to switch Ferrothorn out, simply change Ferrothorn so it uses moves such as Leech Seed and Stealth Rock and Give Metagross the Choice Band and switch out Stealth Rock for Zen Headbutt.