need help with an offensive team!

[mazzew]

i'm not very good at team building, i'll admit, so I thought i'd post here for some suggestions!

Uxie @ Light Clay
Ability: Levitate
EVs: 252 SDef / 252 HP / 4 Def
Calm Nature
- Stealth Rock
- Reflect
- Memento
- Light Screen

Uxie, the lead. I chose uxie because it is one of the only pokemon (besides gardevoir) that has screens + memento and it's pretty bulky and unexpected in OU. the goal is to set up stealth rock, screens, and then memento to allow pinsir to set up and hopefully sweep. EVs are just a standard defensive spread, though im debating putting more into speed? idk.

Pinsir @ Pinsirite
Ability: Hyper Cutter
EVs: 252 Atk / 4 HP / 252 Spd
Adamant Nature
- Swords Dance
- Return
- Close Combat
- Quick Attack

Pinsir, my mega evolution of choice. The goal is to set up with 1 or 2 swords dances and wreck. EVs are pretty standard, maximum attack, maximum speed and 4 HP. I chose adamant nature for maximum damage. I went with return over double edge so Pinsir is a bit longer lived, close combat for coverage against rock/steel types, and quick attack for priority obvs.

Talonflame @ Life Orb
Ability: Gale Wings
EVs: 132 Spd / 252 Atk / 124 HP
Jolly Nature
- Brave Bird
- Flare Blitz
- Swords Dance
- Tailwind

Talonflame as the stanard late game sweeper. the investment in HP lets it take a hit if its lucky, and evs in speed + jolly nature always flare blitz to usually hit what it needs to. Swords Dance is there for a boost if it needs it, and i'm not sure wether I want tailwind or roost yet? It dies quite quickly with the life orb + move recoil, so would a choice band set be better?

Starmie @ Life Orb
Ability: Natural Cure
EVs: 252 Spd / 252 SAtk / 4 SDef
Timid Nature
- Rapid Spin
- Thunderbolt
- Surf
- Ice Beam

Standard offensive starmie, not really much to say. doesn't really serve too much of a purpose besides getting rocks off the field and getting the hell out of there. Maximum investment in speed and spAtk, and i opted for a boltbeam combo because you really can't go wrong. It does an OK job spinning but still dies rather quickly but it's a starmie so hey.

Politoed (M) @ Choice Specs
Ability: Drizzle
EVs: 252 SAtk / 252 HP / 4 SDef
Modest Nature
- Hydro Pump
- Hidden Power [Grass]
- Ice Beam
- Focus Blast

Choice specs politoed! I thought he'd be cool because not many people in the 6th gen OU really expect just a stand alone politoed. He has the regular bulky specs EV spread along with a modest nature that let it soak up a few hits. I used this politoed a lot with my rain team in gen 5 and i really liked it a lot. Although with the nerf to hydro pump i'm wondering if i should switch it out for surf? the rest of the moves just give coverage.

Heatran @ Leftovers
Ability: Flash Fire
EVs: 252 HP / 4 SAtk / 252 Def
Quiet Nature
- Taunt
- Eruption
- Protect
- Toxic

A defensive heatran rather than specially defensive..simply because..I could. It's there to shut down ferrothorn, genesect, forretress + w/e annoying things weak to fire in ou haha. quiet nature because of eruption, though i'm not sure wether just standard flamethrower or lava plume would be better. Taunt is to shut down some annoying walls, protect is just there because it's protect, and toxic is to throw around some status.

this is my favorite team i've made for OU so far but i'm not sure about it? if anybody whos better at this than me could give me some suggestions it'd be much appreciated!! thank you for reading

 

[Garchomp for president]

This team looks nice and well, but I some massive holes. Your team is wreaked by Stealth Rock and Spikes, and you have Drizzle Politoed when your run 2 Fire types, I don't see why you would ever want to do something like that. Also I can see Pokemon with one use in mind yet another Pokemon on your team can fit that role just fine namely, Heatran and Uxie. Also you don't have to run Memento to get a sweep with Pinsir so theirs some work that needs to be done to your team. I think that turning it into a weatherless with Pinsir as the main sweeper would be fine since their is SO much more you can get for an unexpected suprise than Politoed. First, Espeon does a great job of not only setting up Dual Screens, but it's ability, Magic Bounce, can bounce non-damaging moves back to the user, essentially it's the most effective spinner in the game. Its fast, has access to Baton Pass so you can see what your opponent switches into if it were to switch. Set Below. Talonflame should'nt have Swords Dance, as your team just becomes less flexable if your game plan goes wrong so Talonflame should be Banded and run U-Turn. In place of Starmie, Thundy-I is great for priority Thunder Wave, and it has Volt-Switch for Momentum Gaining. Gliscor is great at being a electric absorbed and being all-around annoying with his Toxic Stalling antics. Heatran runs eruption with support moves? I suggest getting rid of Eruption and Taunt for Earth Power and Lava Plume.

Changes

Espeon @ Light Clay
Ability: Magic Bounce
EVs: 252 Spd / 252 HP / 4 SAtk
Timid Nature
- Light Screen
- Reflect
- Psyshock
- Baton Pass

Heatran @ Leftovers
Ability: Flash Fire
EVs: 252 SDef / 252 HP / 4 SAtk
Calm Nature
- Lava Plume
- Toxic
- Protect
- Earth Power

Thundurus (M) @ Leftovers
Ability: Prankster
EVs: 252 Spd / 252 SAtk / 4 HP
Timid Nature
- Thunder Wave
- Thunderbolt
- Volt Switch
- Dark Pulse

Talonflame
Ability: Flame Body
- Flare Blitz
- Brave Bird
- U-turn
- Tailwind

Gliscor @ Toxic Orb
Ability: Poison Heal
EVs: 184 Def / 252 HP / 72 Spd
Impish Nature
- Earthquake
- Toxic
- Protect
- Substitute

 

[Oranos]

If you're looking for a sacrifice dual screen pokemon I would recommend Cresselia instead. You can open with a sweeper, do as much damage as possible without getting KOed (its ok to take a status attack), and when you're ready to settle into your final sweep you can bring cress in (she is much more bulky than Uxie, having nearly double his HP), set up your screens, and then lunar dance out. This fully restores your sweeper and gives you a free switch in (since opponent will attack nothing thanks to lunar dance mechanics).

 

[Winter's Howl]

This may be too nitpicky but Earthquake is better on Pinsir. Especially in its mega form. As you noted, you were trying to hit Rock and Steel types. Earthquake essentially does this better without the harsh defensive and specially defensive drops.
Another note is that you should run Thunder on Starmie for extra damage if you are going to keep Politoed.
Other than that, everyone else has mentioned a lot of what could be done to improve.
Good job and good luck.