The best team I have used - Galvantula, Heracross, Tyranitar, Starmie, Dagonite & M-Venusaur

[Gorphish]

Galvantula w/ Focus Sash

Timid, Compound Eyes

252 SPA, 252 SPE, 6DEF

* Sticky Web
* Bug Buzz
* Thunder
* Volt Switch

My standard lead. With focus sash I can set up a sticky web, and due to his high speed volt switch out or take a decent chunk out of them with Thunder which has 91% accuracy with compound eyes. Bug buzz is there for STAB.

Dragonite w/ Weakness Policy

Adamant, Marvel Scale

252 ATT, 252 SPE, 6HP

* Dragon Dance
* Dragon Claw
* Fire Punch
* ExtremeSpeed

Aim is to get a free switch, set up a DD and hopefully activate my weakness policy. From there he outspeeds most unboosted mons (combined with sticky web) and is so ridiculously powerful that he'll (hopefully) OHKO just about everything. I went with Dragon Claw as I don't want to have to switch out due to Outrage confusion and lose my boosts. Fire Punch allows me to hit most pokemon that dragon claw doesn't and extremeSpeed is there in case my Sticky Web is gone or I get paralyzed. The amount of 4/5/6 sweeps she has gone on for me is just insane; anyone who isn't prepared gets absolutely destroyed.

Starmie w/ Leftovers

Timid, Natural Cure

252 SPA, 252 SPE, 4 SPD

* Surf
* Ice Beam
* Psychic
* Rapid Spin

My offensive rapid spinner. Rapid spin is a must on this team as I need Dragonite to get a free switch in. Psychic is there instead of psyshock to help take out Conkeldurr. Surf over Hydro Pump as of the accuracy and ice beam to take out dragons. Works nicely with Tyranitar, being able to switch into the fighting and water moves that come out whenever Tyranitar is.

Tyranitar w/ Focus Band

Adamant, Sandstorm

252 HP, 252 ATT, 6 SPE

* Crunch
* Stone Edge
* Earthquake
* Pursuit

This absolute monster was chosen to deal with Talonflame which it does to perfection. Will only take about 30% damage from a choice banded Brave Bird and will sometimes KO with crunch, let alone Stone Edge. Even pokemon that resist Stone Edge still have ridiculous chunks of their health taken out by it.

Heracross w/ Flame Orb

Adamant, Guts

252 ATT, 252 SPE, 6 DEF

* Close Combat
* Megahorn
* Night Slash
* Stone Edge

My first choice when building this team. When Sticky Web is up, this thing is insane. Often try and switch him in straight after a volt switch so his guts is activated right away. While he won't live long he can OHKO just about anything when boosted by guts and thanks to sticky web now outspeeds them as well. Will never sweep a whole team but often chimes in with a kill or 3.

Venusaur w/ Venusaurite

Modest, Chlorophyll

252 HP, 252 SPA, 6 SPE

* Synthesis
* Sludge Bomb
* Giga Drain
* Hidden Power - Ice

Absolutely love this mega. Can take so many hits but unlike most walls deal out so much damage. Giga Drain for STAB and recovery, Sludge Bomb for more STAB and to take out those pesky fairies that a lot of my team has trouble with. HP Ice is there for coverage.​

 

[Darnell]

For Starmie I understand that you want to use Psychic for Conkeldurr but I still don't thing that is a good enough reason to stop use Psychic for one Pokemon rather than Psyshock for all the Specially Defensive walls that you are going to encounter. When faced against them with Starmie, you are going to want to hit them hard without being forced to switch all the time. You do that and they get a free chance to recover of their damage that was gained previously in the battle.

Starmie w/ Leftovers
Timid, Natural Cure
252 SPA, 252 SPE, 4 SPD
* Surf
* Ice Beam
* Psyshock
* Rapid Spin

As for Heracross, try replacing Night Slash with Substitute/Earthquake/Swords Dance. I'm pretty Night Slash is for hitting ghost types, correct?
With all the Aegislash still running around in OU I don't understand why you would want to risk the King Shield mind games with Night Slash when you can just spam Earthquake.

252+ Atk Heracross Night Slash vs. 4 HP / 0 Def Gengar: 248-292 (94.6 - 111.4%) -- 68.8% chance to OHKO
Swords Dance...
+2 252+ Atk Heracross Stone Edge vs. 4 HP / 0 Def Gengar: 351-414 (133.9 - 158%) -- guaranteed OHKO
Substitute...
252+ Atk Heracross Stone Edge vs. 4 HP / 0 Def Gengar: 176-208 (67.1 - 79.3%) -- guaranteed 2HKO after Black Sludge recovery

As for the item, don't waste it on letting yourself get burned. Let your opponent take care of that and replace it with something more useful.
Heracross w/ Life Orb/Choice Scarf(If you pick Earthquake)
Adamant, Guts
252 ATT, 252 SPE, 6 DEF
* Close Combat
* Megahorn
* Swords Dance/Substitute/Earthquake* Stone Edge

 

[Mowtom]

I agree, Starmie should probably use Psyshock.

In other news...
For Tyranitar, you should give it a different item. The Focus Band is just terrible. A 10% chance to leave you with 1HP isn't worth your item slot. I would reccomend the Leftovers. Also, especially of you choose to run Earthquake on Her across, I would seriously consider replacing it with Stealth Rock.

On Venusaur, you say HP Ice is for coverage. What exactly does it let you hit? Could we see some damage calcs? Because without this information I think Leech Seed is a better option.

Also, your team is very Sticky-Web centric. However, while looking at it, I can't see how you keep it up. You have no spinblocker and no Taunter. Would you mind explaining?

Finally, and this is very nitpicky, but having 6 EVs in a stat doesn't actually do anything. Dragonite's spread should really be written as 4 HP / 252 Atk / 252 Spe.

 

[Gorphish]

For Starmie I understand that you want to use Psychic for Conkeldurr but I still don't thing that is a good enough reason to stop use Psychic for one Pokemon rather than Psyshock for all the Specially Defensive walls that you are going to encounter. When faced against them with Starmie, you are going to want to hit them hard without being forced to switch all the time. You do that and they get a free chance to recover of their damage that was gained previously in the battle.
Starmie w/ Leftovers
Timid, Natural Cure
252 SPA, 252 SPE, 4 SPD
* Surf
* Ice Beam
* Psyshock
* Rapid Spin

As for Heracross, try replacing Night Slash with Substitute/Earthquake/Swords Dance. I'm pretty Night Slash is for hitting ghost types, correct?
With all the Aegislash still running around in OU I don't understand why you would want to risk the King Shield mind games with Night Slash when you can just spam Earthquake.

252+ Atk Heracross Night Slash vs. 4 HP / 0 Def Gengar: 248-292 (94.6 - 111.4%) -- 68.8% chance to OHKO
Swords Dance...
+2 252+ Atk Heracross Stone Edge vs. 4 HP / 0 Def Gengar: 351-414 (133.9 - 158%) -- guaranteed OHKO
Substitute...
252+ Atk Heracross Stone Edge vs. 4 HP / 0 Def Gengar: 176-208 (67.1 - 79.3%) -- guaranteed 2HKO after Black Sludge recovery

As for the item, don't waste it on letting yourself get burned. Let your opponent take care of that and replace it with something more useful.
Heracross w/ Life Orb/Choice Scarf(If you pick Earthquake)
Adamant, Guts
252 ATT, 252 SPE, 6 DEF
* Close Combat
* Megahorn
* Swords Dance/Substitute/Earthquake* Stone Edge

Fair enough with Starmie, i'm still running psyshock actually but have had more trouble with conkeldurr than any other so I was considering it when writing. Will definitly change Heracross to EQ but I honestly love having flame orb heracross. Allows me to absorb statuses which would ruin dragonite and tyranitar and him gettin paralyzed or hit by toxic is too risky for him. Choice Scarf is not too necessary with Sticky Web up either

 

[Darnell]

Fair enough with Starmie, i'm still running psyshock actually but have had more trouble with conkeldurr than any other so I was considering it when writing. Will definitly change Heracross to EQ but I honestly love having flame orb heracross. Allows me to absorb statuses which would ruin dragonite and tyranitar and him gettin paralyzed or hit by toxic is too risky for him. Choice Scarf is not too necessary with Sticky Web up either

Loads of things in OU are running around with Will-O-Wisp to criple Physical threats. You hardly see anyone running Conkeldurr without Guts and then using a Flame Orb. What makes Heracross any different. I understand it can't be AV set but at least consider another item. As for the Scarf. I agree, I forgot about the Sticky Web support.

 

[Gorphish]

I agree, Starmie should probably use Psyshock.

In other news...
For Tyranitar, you should give it a different item. The Focus Band is just terrible. A 10% chance to leave you with 1HP isn't worth your item slot. I would reccomend the Leftovers. Also, especially of you choose to run Earthquake on Her across, I would seriously consider replacing it with Stealth Rock.

On Venusaur, you say HP Ice is for coverage. What exactly does it let you hit? Could we see some damage calcs? Because without this information I think Leech Seed is a better option.

Also, your team is very Sticky-Web centric. However, while looking at it, I can't see how you keep it up. You have no spinblocker and no Taunter. Would you mind explaining?

Finally, and this is very nitpicky, but having 6 EVs in a stat doesn't actually do anything. Dragonite's spread should really be written as 4 HP / 252 Atk / 252 Spe.

Tyranitar was a complete mistake. I meant choice band which I love on him, making him so powerful. No one in their right mind would ever use a focus band.

HP Ice gives me super effectives on dragon and flying, two types I couldn't hit hard before and are two of the more common types in OU. Will do calcs when it's not this late at night. Giga Drain already gives me a very solid recovery option and I have yet to meet anyone who doesn't just switch out when leech seed is used. I prefer having the coverage.

I'm honestly not too sure on the third point, but in the ~15 games i've played with this team I've had SW removed twice and won both those matches. I think there's been a lto of luck, but I've been able to KO most pokemon before they get a chance to clear. It's definitely something I would need but I can't quite figure out where to change. All of the others are doing their role perfectly and I don't want to switch anyone out...

And does it really matter? In X and Y you have a total of 510 EV's, enough for 252 in 2 stats ad 6 in the other. Considering i'm making this team IG then that's what they'll be

 

[Gorphish]

Loads of things in OU are running around with Will-O-Wisp to criple Physical threats. You hardly see anyone running Conkeldurr without Guts and then using a Flame Orb. What makes Heracross any different. I understand it can't be AV set but at least consider another item. As for the Scarf. I agree, I forgot about the Sticky Web support.

I'd prefer the guarantee of a 1.5 boost everytime i use him. There is very little that survives any of Heracrosses moves when boosted by guts and if I changed it to a life orb then he'd be taking 22% damage every turn, leaving his longeivity to practically nothing.

 

[Sosuk]

It's Multiscale on Dragonite not Marvel Scale, and u can lost your abilitie cause of Tyra sandstorm.

Yeah Flame Orb > Choice Band on Hera. SD/EQ on NightShade would be better on Hera.