Rate my OU team

Hi, guys, can you give me a rating out of 10, and maybe suggestions for improvement?
Tyranitar
Item:Chople Berry
Ability:Sand Stream
EVs:252HP,6Atk,252SpD
Stealth Rock
Crunch
Stone Edge
Superpower
Tyranitar is supposed to start the sandstorm at the start of the battle, and then attempt to lay down the Stealth Rock, after that, it is pretty useless. However, it has its other attacks, which are supposed to wreck as much havoc as possible.

Gliscor
Item:Toxic Orb
Ability: Poison Heal
EVs:252HP,184Def,74Sp
Toxic
Earthquake
Fire Fang
Protect
Gliscor is defensive, and uses the slow and steady method to take out opponents by starting off with the toxic and switching between protect and one of the two attack moves. It has Fire Fang for those pesky ice types.

Mamoswine
Item:Life Orb
Ability:Thick Fat
EVs: 6HP,252Atk,252Sp
Ice Shard
Earthquake
Stone Edge
Icicle Crash
Mamoswine is a physical sweeper, he has the Ice Shard incase there is a fast opponent with little HP. The other three moves are there to humiliate the opponent. Plus STAB Earthquake aswell.

Skarmory
Item:Shed Shell
Ability:Sturdy
EVs:252HP,252Def,26Sp
Roost
Spikes
Roar
Aerial Ace
Skarmory is like Gliscor, defensive, but it is also the official troll of my team. It s main objective is to try and kill the enemy with Spikes just by using Roar many times, and then when the enemy manages to hit it, it just uses Roost and heals again! I have designed it to make people ragequit right away! It also has Aerial Ace, because it could do with an attack move

Metagross
Item:Life Orb
Ability:Clear Body
EVs:54HP,252Atk,204Sp
Agility
Zen Headbutt
Thunderpunch
Meteor Mash
Metagross is the wrecking ball of my team(well, one of three), it focuses on getting its speed up and then taking out opponents with zen headbutt, thinderpunch and STAB meteor mash. this guy should be able to sweep once agility is used once or twice.

Terrakion
Item:Choice Scarf
Ability:Justified
EVs: 6HP,252Atk,252Sp
Close Combat
Stone Edge
X-Scizzor
Sacred Sword
You must now be thinking, what are you doing, camzi? are you insane? The answer is no. Terrakion is here to already be speedy, with the EVs and the scarf, so all happens when it gets sent out is it picks a move, and i get to watch it sweep. Terrakion(which already has base 108 speed), should be able to outspeed most opponents, and then crush them.

Thanks for reading, please rate my team, and if you think it sucks, then please tell me why. (by the way, in case you havent noticed, it's a sandstorm team!)

Natures would be helpful here.

Skarmory is better off with Brave Bird or Drill Peck as its offensive move because both have higher BP than Aerial Ace.

Also, this team kind of struggles against bulky Waters, since half your team is weak to them and Metagross' ThunderPunch is the only attack that can hit them. Lati@s, Ferrothorn or Virizion can fill in for you as checks/counters to them, but you have to give up someone else on the team for at least one of them. Not every Pokemon on the team has to be immune to Sandstorm:

Latias:
-Calm Mind
-Dragon Pulse
-Recover
-Hidden Power (Fire)/Substitute/Roar
Nature: Timid
EVs: 252 HP/4 SAtk/252 Spe
Item: Leftovers

or
-Dragon Pulse
-Recover/Wish
-Roar
-Reflect/Protect
Nature: Timid
EVs: 252 HP/4 SAtk/252 Spe
Item: Leftovers

or
-Calm Mind
-Dragon Pulse
-Recover
-Reflect/Refresh
Nature: Bold
EVs: 252 HP/228 Def/28 Spe
Item: Leftovers

Latios:
-Draco Meteor
-Surf
-Hidden Power (Fire)
-Trick/Psyshock
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Choice Specs/Choice Scarf

or
-Draco Meteor/Dragon Pulse
-Surf
-Hidden Power (Fire)
-Recover/Psyshock
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Life Orb/Expert Belt

or
-Calm Mind
-Dragon Pulse
-Surf
-Hidden Power (Fire)/Recover/Psyshock
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Leftovers

Ferrothorn:
-Spikes/Stealth Rock
-Leech Seed
-Gyro Ball/Thunder Wave/Protect
-Power Whip/Protect
Nature: Relaxed
EVs: 252 HP/88 Def/168 SDef
Item: Leftovers/Shed Shell

Virizion:
-Calm Mind
-Giga Drain
-Focus Blast
-Hidden Power (Ice/Rock)
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Leftovers/Life Orb

or
-Swords Dance
-Leaf Blade
-Close Combat
-Stone Edge/Hidden Power (Ice)
Nature: Jolly/Hasty
EVs: 4 HP/252 Atk/252 Spe
Item: Leftovers/Life Orb

or
-Work Up
-Close Combat
-Giga Drain
-Hidden Power (Ice)/Stone Edge
Nature: Hasty/Naive
EVs: 104 Atk/152 SAtk/252 Spe
Item: Leftovers/Life Orb

or
-Reflect
-Light Screen
-Taunt
-Giga Drain/Close Combat
Nature: Timid/Jolly
EVs: 252 HP/4 Def/252 Spe
Item: Light Clay

Another revenge killer you can consider over Terrakion (because it's weak to several common types) is Stoutland because it has Sand Rush coupled with a decent Attack:
-Return
-Superpower
-Pursuit/Crunch
-Wild Charge
Nature: Adamant
EVs: 252 Atk/4 SDef/252 Spe
Item: Choice Band
Ability: Sand Rush

If you find opposing entry hazards annoying, you can consider Sandslash as an offensive Rapid Spinner:
-Swords Dance
-Earthquake
-Rock Slide
-X-Scissor/Rapid Spin
Nature: Adamant
EVs: 252 Atk/4 Def/252 Spe
Item: Life Orb/Lum Berry
Ability: Sand Rush

ScaryDodge said:

Change Sacred Sword by Swords Dance on Terrakion

Click to expand...

Seriously? >_> No way. Terrakion is holding a Choice Scarf, which means that if it uses SD while holding said item, it gets locked into the move until it switches. This Terrakion set is meant to be a revenge killer, not something that can plow through teams (though it's possible for a Scarf Pokemon to do that if its base (Special) Attack is high enough)