Standard OU Team

[Shizzable]

So I recently started to dabble in competitive battling, here's my OU team:

Latte (Latios) (M) @ Expert Belt
Trait: Levitate
EVs: 36 Atk / 216 SAtk / 4 SDef / 252 Spd
Lonely Nature
- Thunderbolt
- Surf
- Draco Meteor
- Earthquake

I made this guy last as a standard special attacker, and a cover to all the weaknesses I could find.

Hitmontree (Breloom) @ Life Orb
Trait: Technician
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature
- Spore
- Bullet Seed
- Mach Punch
- Stone Edge

A hard hitter designed to kill as many Pokemon as possible in its presumably short life.

Kratos (Scizor) @ Leftovers
Trait: Technician
EVs: 252 HP / 252 Atk / 4 SDef
Adamant Nature
- Swords Dance
- Bug Bite
- Bullet Punch
- Superpower

Sort of a bulky version of my Breloom, and a physical sweeper if I can set up a Swords Dance or two.

Humpty (Blissey) (F) @ Leftovers
Trait: Natural Cure
EVs: 4 HP / 252 Def / 252 SDef
Calm Nature
- Softboiled
- Stealth Rock
- Flamethrower
- Toxic

My lead and a toxic staller as well. However, I feel like I should have wish and aromatherapy. What do you think?

Sheldon (Cloyster) @ Leftovers
Trait: Skill Link
EVs: 248 HP / 84 Atk / 176 Def
Impish Nature
- Icicle Spear
- Rapid Spin
- Rock Blast
- Hydro Pump

This guy can do lots of damage, especially to Dragons, thanks to Skill Link. A Rapid Spinner as well.

Houdini (Alakazam) @ Life Orb
Trait: Magic Guard
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature
- Psychic
- Focus Blast
- Signal Beam
- Shadow Ball

Life Orb + Magic Gaurd works wonders and makes this one a great special sweeper.

How do you think I should change my team? I especially want to look at a possible change to Blissey to more of a utility Pokemon.

 

[PlatinumDude]

The main issue I see on the team is Latios. If you want it to go "mixed", here's your best bet for it:
-Dragon Dance
-Outrage
-Earthquake
-Hidden Power (Fire)/Draco Meteor
Nature: Naive
EVs: 252 Atk/4 SAtk/252 Spe
Item: Life Orb

Be sure to use this Latios to its strengths (the surprise factor and effective late-game cleaning); otherwise, it's essentially an inferior Salamence, Haxorus, Hydreigon or Dragonite; these dragons can pull off Dragon Dance or mixed sets better, making you better off using the standard Special Latios or the aforementioned dragons:

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

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

or
-Calm Mind
-Dragon Pulse
-Surf
-Recover/Psyshock
Nature: Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Leftovers

or
-Reflect
-Light Screen
-Dragon Pulse
-Memento
Nature: Timid
EVs: 252 HP/4 Def/252 SDef
Item: Light Clay

Dragonite:
-Dragon Dance
-Outrage/Dragon Claw
-Fire Punch
-Earthquake/ExtremeSpeed/Roost
Nature: Adamant/Jolly
EVs: 252 Atk/4 SDef/252 Spe
Item: Leftovers/Lum Berry
Ability: Multiscale

or
-Outrage
-ExtremeSpeed
-Earthquake/Superpower
-Fire Punch/Waterfall
Nature: Adamant
EVs: 4 HP/252 Atk/252 Spe
Item: Choice Band
Ability: Multiscale

or
-Substitute
-Dragon Dance
-Dragon Claw
-Roost
Nature: Jolly
EVs: 252 HP/72 Def/60 SDef/124 Spe
Item: Leftovers
Ability: Multiscale

Haxorus:
-Dragon Dance
-Outrage
-Earthquake
-Low Kick/Taunt
Nature: Adamant/Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Lum Berry/Yache Berry
Ability: Mold Breaker

or
-Dragon Dance
-Swords Dance
-Outrage
-Earthquake/Superpower
Nature: Adamant/Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Lum Berry/Draco Plate
Ability: Mold Breaker

Hydreigon:
-Draco Meteor
-Fire Blast
-Superpower
-Earthquake/Earth Power/Dark Pulse/Roost
Nature: Rash/Mild
EVs: 4 Atk/252 SAtk/252 Spe
Item: Life Orb/Expert Belt

or
-Substitute
-Dragon Pulse
-Focus Blast
-Fire Blast/Roost
Nature: Modest
EVs: 4 HP/252 SAtk/252 Spe
Item: Leftovers/Life Orb

or
-Draco Meteor
-Fire Blast
-Focus Blast
-U-turn/Dark Pulse
Nature: Modest
EVs: 4 HP/252 SAtk/252 Spe
Item: Choice Specs

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

I'd rather have Low Sweep somewhere on Breloom to slow down faster threats that switch in, probably over Stone Edge or Spore. While Grass/Fighting is resisted by Volcarona, it won't like taking a Spore if Sleep clause isn't active.

Personally,I think Blissey's set is fine, but I don't think that Wish and Aromatherapy should go together because of moveslot constraints. If you give up Protect or Softboiled, then Blissey will have a hard time recovering from Wish itself because it will most likely be taken out before Wish connects. If you give up Seismic Toss or Flamethrower, then it'll become Taunt bait. If you give up Toxic, you'll have a hard time dealing with opposing walls. More below:

Give Cloyster an entry hazard; otherwise, it plays like a worse Starmie, given Cloyster's bad defensive typing:
-Icicle Spear
-Rapid Spin
-Spikes/Toxic Spikes
-Surf (accuracy is more important on defensive sets than offensive ones)/Ice Shard
Nature: Relaxed (with Surf)/Impish (with Ice Shard)
EVs: 248 HP/84 Atk/176 Def
Item: Leftovers
Ability: Skill Link

With this set, you can leave the entry hazard setting duties to Cloyster and freely replace Blissey's Stealth Rock with Aromatherapy.

I'd rather have Hidden Power Ice or Fire on Alakazam over Signal Beam and Shadow Ball, since both handle opposing Psychics already, and that's redundant; the former HP type is for Dragons and Landorus-T, while the latter is for Ferrothorn, Skarmory, Scizor and Forretress.

 

[Shizzable]

Thanks for the advice! I made some changes to my team, some big and some small. I replaced Latios with Hydreigon (it's funny, I had a Hydreigon on the first version of my team but it was suggested that I change it to Latios). I also made some movesest changes, like giving Blissey Aromatherapy.

However, I ended up replacing Cloyster with Starmie and kept Blissey as my lead, as Cloyster seemed to get OHKO'ed all the time.