Rate my OU team.

[pokemongarnet]

Skarmory

-Stealth Rock
-Toxic
-Whirlwind
-Roost

252 HP
128 Def
128 Sp. Def

Leftovers

Impish

Keen Eye

Skarmory is to set up entry hazards, cause status conditions, and be a physical wall.
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Electivire

-Thunderbolt
-Ice Punch
-Earthquake
-Flamethrower

220 Spd
36 Attack
252 Sp.Atk

Expert Belt

Mild

Motor Drive

Electivire is one of three mixed sweepers on my team, and i can bait the electric attack to set up a motor drive using either Suicune or Skarmory.
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Azelf

Explosion
Psychic
Flamethrower
Grass Knot

40 Atk
252 Sp. Atk
216 Spd

Life Orb

Naive

Levitate

Azelf is another one of the mixed sweepers.
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Salamence

Draco Meteor
Earthquake
Flamethrower
Outrage

16 Atk
240 Sp. Atk
252 Spd

Life Orb

Naive

Intimidate

Salamence is the third mixed sweeper on my team.
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Cresselia

Thunder Wave
Ice Beam
Reflect
Rest

252 HP
252 Def
4 Sp.Def

Leftovers

Bold

Levitate
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Suicune

Calm Mind
Rest
Surf
Ice Beam

252 HP
252 Def
4 Sp. Def

Leftovers

Bold

Pressure

This is just the classic "calmcune" that I'll use to either calm mind until my stats are maxed and then sweep the rest of their team, or if im facing a bulky water, I'll just pressure stall out all their moves and let them KO themselves from struggle recoil.
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I understand that there are some repeat items, but I just transfered them over from my Pearl version.

 

[Anti]

This is a good start. Before I get into this, I would first read the section in The Rules about recommended RMT format since this is pretty messy and hard to read. For example your first set would be:

Skarmory @ Leftovers
Trait: Keen Eye
EVs: 252 HP / 128 Def / 128 SDef
Impish Nature (+Def, -SAtk)
- Stealth Rock
- Toxic
- Whirlwind
- Roost


That aside, it's not a bad team, but it's lacking in key areas.

The big problem has got to be synergy. You're running three defensive Pokemon (Suicune is being counted here, but obviously it poses a threat sweeping) and three offensive Pokemon, and while this type of arrangement can work, they don't really support each other well.

This team has potential offensively, so I would make your defensive Pokemon support your sweepers better. Skarmory is a misfit really--Metagross is a much more effective Stealth Rock lead that has more power and can beat Taunt + SR leads like Aerodactyl and Azelf.

Electivire actually isn't a bad fit here, but you'll want to alter the set. It really wants Cross Chop/Thunderbolt/Flamethrower/Hidden Power [Ice/Grass]. Ice fits better here since Swampert has trouble with a lot of your team, but if you can't get HP Ice, just use Ice Punch. But Cross Chop over Earthquake is important to beat Blissey, Snorlax, Tyranitar, and weakened Heatran.

Cresselia with Rest and no Aromatherapy support is really asking for trouble. Moonlight is unreliable but at least Cresselia can defend itself.