Looking to round off my team, opinions needed

[ZeroOption]

Team Info as below guys. Was originally posted on general discussions under X/Y until I got guided here. Received different ideas which is leading me to the conclusion that perhaps Tyranitar (if not someone else) needs to be replaced with a better alternative.

Any obvious changes required on this team?


Salamence
Ability = Intimidate
Nature = Timid
Dragon Breath, Crunch, Fly, Zen Headbutt


Arcanine
Ability = Intimidate
Nature = Quirky
Flame Burst, Outrage, Heat Wave, Crunch


Garchomp
Ability = Sand Veil
Nature = Hasty
Sandstorm, Dragon Rush, Earthquake, Dig


Magnezone
Ability = Sturdy
Nature = Bold
Thunderbolt, Flash Cannon, Magnet Rise, Mirror Shot


Metagross
Ability = Clear Body
Nature = Sassy
Bullet Punch, Meteor Mash, Psychic, Hammer Arm


Tyranitar
Ability = Sand Stream
Nature = Sassy
Dark Pulse, Thrash, Sandstorm, Earthquake

 

[PlatinumDude]

EVs and items would be greatly appreciated. You'll need to do some re-breeding or re-catching, I'm afraid.

Salamence is outright terrible. Not only do you have a Timid nature, which lowers the damage output of all your physical moves, but your current move set doesn't have the best coverage:
-Dragon Dance
-Outrage/Dragon Claw
-Earthquake
-Fire Blast/Hydro Pump
Nature: Naive
EVs: 252 Atk/4 SAtk/252 Spe
Item: Life Orb/Lum Berry

or
-Outrage
-Dragon Claw
-Earthquake
-Fire Blast/Aqua Tail
Nature: Naive/Jolly
EVs: 252 Atk/4 SAtk/252 Spe
Item: Choice Scarf
Ability: Moxie

or
-Draco Meteor
-Outrage
-Earthquake
-Fire Blast
Nature: Naive
EVs: 64 Atk/192 SAtk/252 Spe
Item: Life Orb

Arcanine isn't cut for OU. Sure, it has the move pool and stats to be OU, but its pure Fire typing means it doesn't see much use there. Blaziken can do what it does better, despite having to commit two move slots for offensive moves. It's also neutral to Stealth Rock, which is somewhat widespread in the standard environment (I can't really suggest Infernape because Poke Transfer isn't available yet):
-Flare Blitz
-High Jump Kick
-Protect/Baton Pass
-Swords Dance/Baton Pass
Nature: Adamant/Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Life Orb/Leftovers/Blazikenite
Ability: Speed Boost

Dragon Rush is VERY unreliable. Don't bother with it. Garchomp has more coverage moves outside of Dragon/Ground:
-Swords Dance
-Dragon Claw/Outrage
-Earthquake
-Fire Fang/Aqua Tail
Nature: Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Lum Berry/Yache Berry

or
-Outrage
-Earthquake
-Fire Blast/Stone Edge/Fire Fang/Aqua Tail
-Dragon Claw/Dual Chop
Nature: Naive/Jolly
EVs: 252 Atk/4 SAtk/252 Spe
Item: Choice Scarf/Choice Band

or
-Stealth Rock
-Dragon Claw/Outrage
-Earthquake
-Fire Blast/Swords Dance
Nature: Naive/Jolly
EVs: 252 Atk/4 SAtk/252 Spe
Item: Focus Sash

Even though Sturdy is a good ability, Magnet Pull is still Magnezone's preferred ability to trap and eliminate Steel Pokemon. Magnet Rise is situational and it does the same job that Air Balloon would have done without wasting a turn:
-Volt Switch
-Thunderbolt
-Flash Cannon
-Hidden Power (Ice/Fire)
Nature: Modest
EVs: 172 HP/252 SAtk/84 Spe
Item: Choice Specs
Ability: Magnet Pull

or
-Substitute
-Thunderbolt
-Charge Beam/Flash Cannon
-Hidden Power (Ice/Fire)
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Leftovers/Air Balloon
Ability: Magnet Pull

or
-Volt Switch
-Thunderbolt
-Flash Cannon
-Hidden Power (Ice/Fire/Ground)
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Choice Scarf
Ability: Magnet Pull

Metagross is kinda eh on the team, since you already have a Steel Pokemon in Magnezone. Here are some much better sets to use:
-Stealth Rock
-Meteor Mash
-Pursuit
-Hammer Arm/Earthquake
Nature: Adamant
EVs: 252 HP/96 Atk/160 SDef
Item: Leftovers

or
-Meteor Mash
-Bullet Punch
-Hammer Arm/Earthquake
-Zen Headbutt/ThunderPunch
Nature: Adamant
EVs: 164 HP/252 Atk/92 Spe
Item: Choice Band

or
-Agility
-Zen Headbutt
-Earthquake
-Meteor Mash/Ice Punch
Nature: Adamant/Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Life Orb/Lum Berry/Air Balloon

or
-Meteor Mash
-Hidden Power (Fire)
-Grass Knot
-Earthquake/Zen Headbutt
Nature: Naughty
EVs: 252 HP/228 SAtk/28 Spe
Item: Life Orb

Or you can consider a Ground-immune or Ground-resistant Pokemon like Skarmory or Ferrothorn instead of Metagross. While they don't pack the raw power Metagross has, they're in here for the utility they provide:
Skarmory:
-Stealth Rock/Spikes
-Whirlwind
-Roost
-Brave Bird/Iron Head/Taunt
Nature: Impish/Careful
EVs: 224 HP/252 Def/32 SDef or 224 HP/32 Def/252 SDef
Item: Leftovers/Shed Shell
Ability: Sturdy

Ferrothorn:
-Spikes/Stealth Rock
-Leech Seed/Stealth Rock
-Power Whip/Protect
-Gyro Ball/Thunder Wave
Nature: Relaxed
EVs: 252 HP/48 Def/208 SDef
Item: Leftovers

Tyranitar may bring some common weaknesses to the team (like Ground). But if you really want to use it, be my guest. It has a wide movepool, and you're not taking advantage of it:
-Stealth Rock
-Crunch
-Pursuit
-Stone Edge/Superpower/Fire Blast
Nature: Careful/Sassy
EVs: 252 HP/4 Atk/252 SDef
Item: Leftovers
Ability: Sand Stream

or
-Stone Edge
-Crunch
-Pursuit
-Superpower
Nature: Adamant/Jolly
EVs: 180 HP/252 Atk/76 Spe or 4 HP/252 Atk/252 Spe
Item: Choice Band/Tyranitarite/Assault Vest/Choice Scarf
Ability: Sand Stream

or
-Stealth Rock
-Crunch
-Fire Blast/Ice Beam
-Low Kick/Ice Beam
Nature: Mild/Hasty
EVs: 4 Atk/252 SAtk/252 Spe
Item: Focus Sash
Ability: Sand Stream

or
-Dragon Dance
-Stone Edge
-Crunch
-Earthquake/Fire Punch/Ice Punch
Nature: Jolly/Adamant
EVs: 4 HP/252 Atk/252 Spe
Item: Life Orb/Lum Berry/Chople Berry/Babiri Berry/Tyranitarite
Ability: Sand Stream

 

[Draven1234]

I believe PlatinumDude has given you some really good advice and you should seriously consider it. Just to let you know, Metagross can't learn Stealth Rock this gen (Correct me if I'm wrong) so, you might have to wait a while or choose something else.

 

[ZeroOption]

EVs and items would be greatly appreciated. You'll need to do some re-breeding or re-catching, I'm afraid.

Salamence is outright terrible. Not only do you have a Timid nature, which lowers the damage output of all your physical moves, but your current move set doesn't have the best coverage:
-Dragon Dance
-Outrage/Dragon Claw
-Earthquake
-Fire Blast/Hydro Pump
Nature: Naive
EVs: 252 Atk/4 SAtk/252 Spe
Item: Life Orb/Lum Berry

or
-Outrage
-Dragon Claw
-Earthquake
-Fire Blast/Aqua Tail
Nature: Naive/Jolly
EVs: 252 Atk/4 SAtk/252 Spe
Item: Choice Scarf
Ability: Moxie

or
-Draco Meteor
-Outrage
-Earthquake
-Fire Blast
Nature: Naive
EVs: 64 Atk/192 SAtk/252 Spe
Item: Life Orb

Arcanine isn't cut for OU. Sure, it has the move pool and stats to be OU, but its pure Fire typing means it doesn't see much use there. Blaziken can do what it does better, despite having to commit two move slots for offensive moves. It's also neutral to Stealth Rock, which is somewhat widespread in the standard environment (I can't really suggest Infernape because Poke Transfer isn't available yet):
-Flare Blitz
-High Jump Kick
-Protect/Baton Pass
-Swords Dance/Baton Pass
Nature: Adamant/Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Life Orb/Leftovers/Blazikenite
Ability: Speed Boost

Dragon Rush is VERY unreliable. Don't bother with it. Garchomp has more coverage moves outside of Dragon/Ground:
-Swords Dance
-Dragon Claw/Outrage
-Earthquake
-Fire Fang/Aqua Tail
Nature: Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Lum Berry/Yache Berry

or
-Outrage
-Earthquake
-Fire Blast/Stone Edge/Fire Fang/Aqua Tail
-Dragon Claw/Dual Chop
Nature: Naive/Jolly
EVs: 252 Atk/4 SAtk/252 Spe
Item: Choice Scarf/Choice Band

or
-Stealth Rock
-Dragon Claw/Outrage
-Earthquake
-Fire Blast/Swords Dance
Nature: Naive/Jolly
EVs: 252 Atk/4 SAtk/252 Spe
Item: Focus Sash

Even though Sturdy is a good ability, Magnet Pull is still Magnezone's preferred ability to trap and eliminate Steel Pokemon. Magnet Rise is situational and it does the same job that Air Balloon would have done without wasting a turn:
-Volt Switch
-Thunderbolt
-Flash Cannon
-Hidden Power (Ice/Fire)
Nature: Modest
EVs: 172 HP/252 SAtk/84 Spe
Item: Choice Specs
Ability: Magnet Pull

or
-Substitute
-Thunderbolt
-Charge Beam/Flash Cannon
-Hidden Power (Ice/Fire)
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Leftovers/Air Balloon
Ability: Magnet Pull

or
-Volt Switch
-Thunderbolt
-Flash Cannon
-Hidden Power (Ice/Fire/Ground)
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Choice Scarf
Ability: Magnet Pull

Metagross is kinda eh on the team, since you already have a Steel Pokemon in Magnezone. Here are some much better sets to use:
-Stealth Rock
-Meteor Mash
-Pursuit
-Hammer Arm/Earthquake
Nature: Adamant
EVs: 252 HP/96 Atk/160 SDef
Item: Leftovers

or
-Meteor Mash
-Bullet Punch
-Hammer Arm/Earthquake
-Zen Headbutt/ThunderPunch
Nature: Adamant
EVs: 164 HP/252 Atk/92 Spe
Item: Choice Band

or
-Agility
-Zen Headbutt
-Earthquake
-Meteor Mash/Ice Punch
Nature: Adamant/Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Life Orb/Lum Berry/Air Balloon

or
-Meteor Mash
-Hidden Power (Fire)
-Grass Knot
-Earthquake/Zen Headbutt
Nature: Naughty
EVs: 252 HP/228 SAtk/28 Spe
Item: Life Orb

Or you can consider a Ground-immune or Ground-resistant Pokemon like Skarmory or Ferrothorn instead of Metagross. While they don't pack the raw power Metagross has, they're in here for the utility they provide:
Skarmory:
-Stealth Rock/Spikes
-Whirlwind
-Roost
-Brave Bird/Iron Head/Taunt
Nature: Impish/Careful
EVs: 224 HP/252 Def/32 SDef or 224 HP/32 Def/252 SDef
Item: Leftovers/Shed Shell
Ability: Sturdy

Ferrothorn:
-Spikes/Stealth Rock
-Leech Seed/Stealth Rock
-Power Whip/Protect
-Gyro Ball/Thunder Wave
Nature: Relaxed
EVs: 252 HP/48 Def/208 SDef
Item: Leftovers

Tyranitar may bring some common weaknesses to the team (like Ground). But if you really want to use it, be my guest. It has a wide movepool, and you're not taking advantage of it:
-Stealth Rock
-Crunch
-Pursuit
-Stone Edge/Superpower/Fire Blast
Nature: Careful/Sassy
EVs: 252 HP/4 Atk/252 SDef
Item: Leftovers
Ability: Sand Stream

or
-Stone Edge
-Crunch
-Pursuit
-Superpower
Nature: Adamant/Jolly
EVs: 180 HP/252 Atk/76 Spe or 4 HP/252 Atk/252 Spe
Item: Choice Band/Tyranitarite/Assault Vest/Choice Scarf
Ability: Sand Stream

or
-Stealth Rock
-Crunch
-Fire Blast/Ice Beam
-Low Kick/Ice Beam
Nature: Mild/Hasty
EVs: 4 Atk/252 SAtk/252 Spe
Item: Focus Sash
Ability: Sand Stream

or
-Dragon Dance
-Stone Edge
-Crunch
-Earthquake/Fire Punch/Ice Punch
Nature: Jolly/Adamant
EVs: 4 HP/252 Atk/252 Spe
Item: Life Orb/Lum Berry/Chople Berry/Babiri Berry/Tyranitarite
Ability: Sand Stream

As soon as I read this I just thought; WOW.

Thank you for the advice you've helped me so much. Will take a little work to get everything put together with items and natures and such, not too familiar with how to get the right natures but i'm sure i'll find a thread or work it out. After all pokemon is a game I don't mind making a grind for.

I was open to alternative pokemon suggestions as well but seeing as you've taken the time to give me a genuinely useful response with what I initially posted I shall put the time in with running on your recommendations. This was purely a provisional team as an initial setup as I had a good idea of who I wanted within my team but was unsure when it came to ideal natures/movesets.

Again, thank you. ;)

I believe PlatinumDude has given you some really good advice and you should seriously consider it. Just to let you know, Metagross can't learn Stealth Rock this gen (Correct me if I'm wrong) so, you might have to wait a while or choose something else.

Agreed, to be honest I wasn't expecting such an indepth response from the first person to post.

I think you're correct about Metagross / Stealth Rock. Might need to do a little more trial and error in getting the correct pokemon as replacement as I was enjoying the current party for damage output but I am aware against the better players out there I wouldn't have a hope whatsoever as I have virtually no supporting / defensive moves to help me get out of difficult situations.