Ok, I've assembled myself a Wi-fi Triple Battle Sandstorm team (that also works well in Singles and Doubles, but excels at Triples), and I think I need it to be rated by professionals:
Choice Scarf Sand Set-up
Tyranitar @Choice Scarf
Ability: Sand Stream
EVs: 252 Attk, 252 Def., 4 Speed
Moves: Dragon Claw, Rock Slide, Earthquake, Crunch
Tyranitar sets up the Sand instantly, and is almost always the lead. His Choice Scarf lets him easily outspeed most of his usual counters, bar Mienshao, and acts as a good scout.
Durant @Focus Sash
EVs: 252 Attk, 4 Def, 252 Speed
Move: Hone Claws, X-Scissor, Rock Slide, Iron Head
Durant goes right in-center, able to hit anything with her Rock Slide. Her STAB Iron Head can easily OHKO a Terrakion, and the same goes with X-Scissor on Alakazam and other strong Psychics.
Can't Touch this Sand Veil Sweeper
Gliscor @Yache Berry
Ability: Sand Veil
EVs: 252 Attk, 128 Def, 128 Speed
Moves: Swords Dance, U-Turn, Ice Fang, Earthquake
Gliscor can come into three roles: if she's given a free turn he can easily set up a Swords Dance hassle-free, take an easy switch with her fast U-Turn, or go and hit common Sand treats Gliscor, Excadrill, and Landorus with ease.
Mixed Wall/Special Attacker
Heatran @Shuca Berry
Ability: Flash Fire
EVs: 128 Def, 252 Sp. Attk, 128 Sp. Def
Moves: Protect, Stealth Rock, Fire Blast, Earth Power
Heatran acts as both Durant's protector and a wall towards the Ferrothorns and Forretresses out there. Depending on the situation, he can come as a secondary lead to set up Rocks, or come in later to tank hits.
The Special Attacking Powerhouse
Reuniclus @Life Orb
Ability: Magic Guard
EVs: 252 HP, 252 Sp. Attk, 4 Sp.Def
Moves: Psychic, Shadow Ball, Focus Blast, Trick Room
With his ability, Reuniclus will not be affected by the Sandstorm, and acts as a good protection or Revenge-killer against Conkeldurr, Mienshao, or other strong Fighters who will give Tyranitar problems.
Mixed Bag Support
Ability: Shed Skin
EVs: 252 Attk, 252 Def., 4 Sp. Def
Moves: Fake-Out, Bulk Up, Crunch, Drain Punch
Scrafty's Lefties neglegate Sandstorm damage, and he acts as another good leader or supported with Fake-Out to allow the other Pokes to sweep without worrying about being knocked out by the opposing threat in that once turn. Plus, he also cancels out other Tyranitar users with his highly-powerful Drain Punch.
This team I have been using has been pretty victorious in Wi-fi battles, and is a good check and counter to most Sun teams. But I'm still debating on whether Scrafty should keep that place: I have a very-bulky Spiritomb and Carracosta who also are vying for that last spot. If you have any suggestions for move swaps/who should really be on the 6th slot of my party, it would be very appreciated.