It's been a few months since I posted in this thread. I have been following it though!
I played subway for the first time in a while recently. First thing I did was give Sawk some elemental punches to make Flying types more managable! That didn't affect the team too much and it's still fun to use. I tried a few streaks and got 70+ each time but lost soon after for various reasons. Might try it again some time.
But for now I'm sitting at 70 wins with this doubles team:
Landorus-T @ Choice Scarf
Heatran @ Air Balloon
Rotom-W @ Wide Lens
Hidden Power (Grass)
Hydreigon @ Life Orb
I've been trying to get a few teams based around Landorus-T Earthquake spam to work. I tried a few things, starting with Azelf as a fellow lead. That didn't work so well though. Azelf just didn't cut it. As a joke I even tried an Ice Gem Cryogonal! It actually worked better than you might think. Cryogonal's Ice STAB was helpful and with Protect it could lure pokemon into trying to hit its lousy physical defense only to be screwed over. Plus it has Levitate. However I ended up getting destroyed by a Trick Room team during my 4th set of 7 battles and I knew there was no way I was going to stick with Cryogonal long term (if it could just learn Taunt...).
So I decided to try Air Balloon Heatran and it's been working quite well. Heatran is good because it handles most Ice types with ease, which is crucial for Landorus-T. This does leaves me sorely weak to Water, so I put Rotom-W in as a back-up, and Hydreigon was kinda just tacked on because it was something else that I had on me at the time that had Levitate and was resistant to water, and they've been working fine. Overall the team is still weak to Water/Ice in general though, and Fishermen and Parasol Ladies are awful to face up against (proof: 71-58348-55120) but those trainers are thankfully rare compared to Black Belts/Battle Girls and Psychics (at least in my experience they are).
I think this still needs a bit of work. Still not sure about Flash Cannon on Heatran as the coverage with Flamethrower isn't great (walled by Waters and Fires) but I like the solid power and neutral coverage it has, and I'm considering changing Rotom-W's EV spread from the max Speed/max Sp. Att (with Modest) I have now to a bulkier slower spread to make switching in easier. I doubt I'll change anything before I lose though. I hate changing things partway through because I'm afraid I'll lose a streak because of it!
Anyway that's what I'm up to for now so I'll see how this goes. Good luck to everyone else with their attempts.