...shooter battles? (Googles)
Here's my Doubles fantasy team with 6 members. It'd actually work OK with just the first 4 Pokemon, but I'd probably have to change some stuff since it would have a real issue with Steels and Sunny Day teams.
Team 1: Tri-Weather
*Politoed (Drizzle [Dream World])
*Toxicroak (Dry Skin [normal])
*Tyranitaur (Sandstorm [normal])
*Skarmory (Sturdy [normal])
*Ninetales (Drought [Dream World])
*Victini OR Sunny Ferrothorn
Alts: (Mienshao, Blaziken, Darmanitan)
Since Ferrothorn already has a 4x fire weakness, boosting fire's overall power with drought wouldn't be recommended. A triple weather team is somewhat overkill, IMO, however it could have benefits by messing with other team's weather. Especially if you can catch an opposing solarbeamer off guard, leaving them useless for a turn.
However, with Team Preview in effect in B/W (I think) it won't have as much shock value as in previous generations.
Also, Skarmory isn't really a sandstorm abuser, as it doesn't gain anything from SS- it only has immunity from damage. Sandstorm abusers can be:
Excadrill, Landorus, Terrakion (gains SpDef boost), Stoutland (immunity and speed boost from Sand Rush ability). Pairing one of the first three with Tyranitar would be more effective, unless you are trying to stall out the foe and win by racking up hazard damage.
The rain section of your team is solid, and Ferrothorn actually pairs well with Politoed, as its 4x fire weakness is lowered to 2x.
I would honestly suggest a dual weather team of Sandstorm and Rain, as, IMO, they are the best weathers. Possibly a team of:
T-tar
Excadrill
Ferrothorn
Politoed
Toxicroak
Skarmory/Kingdra/Scizor/Dragonite
The last slot is based on your playstyle. Skarmory would be good for stall, while Kindra is a powerhouse with Swift Swim and Surf/Draco Meteor. Scizor benefits from rain similarily to Ferro, and is also immune to Sandstorm as well. Dragonite has a solid base stat distribution, and with Multiscale it pretty much can't be OHKOd. It can also use Hurrican and Thunder, as well as Outrage, the former two moves getting perfect accuracy in rain. The dowside is that if T-tar switches in, you lose two moves effectively.
Just my thoughts. I've never run dual (or triple) weather...
