Just thought I should update, I'm using the tailwind I posted on the previous page. Well, not exactly that team. I'm using Tornadus/Infernape/Hydreigon/mystery water type. I won't share what that last pokemon is until I'm ready to do a proper write-up (hint: it isn't Gyarados).
It has been going nicely and most battles are quick and easy. I remember lolnub saying that Tailwind teams are better than Trick Room teams because Tailwind teams are less reliant in their gimmick. Having used both I completely agree. Tailwind isn't even used that often because my leads are so fast and powerful that they usually cope just fine.
The game loves throwing legendary teams at me though. They take a lot out of me since I have to actually THINK about what I'm doing and one wrong move can cost you the match.
I made 1 attempt with my current set-up and made it to 84 wins easily before losing to a legendary team (it was the first match of the day which sucks). Bad misplay turn 1 where I tried to get tricky and Taunted Regigigas to prevent it starting its evasion crap. Ended up losing Tornadus turn 1 without setting up tailwind, and one of the back-ups was Specs Latios which tore my team to shreds. The annoying thing though was that Regigigas ended up using Thunder on my Infernape anyway so Taunt didn't really help much...
Restarted and did 21 battles in less than an hour which is cool. May do some more later today.
In regards to dual Intimidate leads, I remember when I was trying to come up with the most gimmicky doubles teams and thought of using Skill Swap Intimidate Stantler + Intimidate partner. It abuses the fact that abilities reactivate after they are swapped (I think this is new to 5th gen), so basically the opponents would be at -2 attack from the start, and then both Intimidates would reactivate again after being swapped leaving the opponents at -4 attack! It's a stupid idea though, and it would never work consistently enough to bother with.
Still, I think dual Intimidate leads could be good. Even if you don't actually abuse the stat drops with Calm Mind/Quiver Dance, nerfing opponents from the start like that can only be a good thing (of course, it wouldn't help against special attackers or Clear Body).