What's your team and what resources have you been utilizing!
My main doubles team is this:
Noivern (Frisk) <Timid> @Choice specs
252 Spec A / 252 Speed/ 4 HP
- Draco meteor
- Air slash
Scizor (Technician) <Adamant> @Lum berry
252 Attack / 252 HP/ 4 Def
- Bullet punch
- Bug bite
- Knock off
I generally start with these two first, and they've proven pretty effective. Choice specs draco meteor OHKOs tons of things, and those that survive with a sliver of health can by finished with a bullet punch. Noivern is great because it's just so goddamn fast that it out-speeds almost everything. Switcheroo completely wrecks walls that would otherwise cause problems.
Frisk is very useful, since I can scout out any potential focus sash users that may survive DM and possibly cripple Noivern. It also gives me an idea of what items Scizor can knock off or berries he can steal.
I was sort of debating on using mega Scizor, but lum berry has actually been really good, since a lot of pokes seem to carry swagger, and it allows me to nab a free attack boost. It's also pretty good for baiting them into inflicting status then using the free turn to finish them off. Also, Weaviles (obvious threat to Noivern) in doubles very rarely carry focus sash or ice shard, so I've been easily able to OHKO them with bullet punch. Big threats like Aerodactyl and Archeops also fall to one BP.
The other two are:
Vaporeon (Water absorb) <Bold> @Leftovers
252 HP / 252 Def/ 4 Spec A
- Ice beam
Umbreon (Synchronize) <Calm> @Sitrus berry
252 HP / 252 Spec D/ 4 Def
- Foul play
- Heal bell
I usually switch in Vaporeon if there's an incoming ice/fire type move user that Noivern can't KO. Ice shard is mostly an issue. It was a real trial and error thing at first, since there's a lot of ice/fire move users beyond the obvious, like ice beam on Exploud and flamethrower on Slurpuff, but once I got a grasp of the moveset variants, I knew when to switch in. Actually, that's another thing frisk is good for; different movesets carry different items, so it allowed me to tell what variant of moveset the Pokémon I was up against had.
Umbreon is.... not quite as useful as I hoped it'd be, but I've had some good runs with it. Basically, status was kicking my ass at certain points, like paralysis on Noivern and burns on Vaporeon and Scizor, so heal bell was good in that regard. Mostly Umbreon is just there to sponge hits and allow its team-mate to do the heavy damage, occasionally lending a hand with foul play and toxic.
THIS TURNED OUT REALLY LONG-WINDED, sorry.... It's far from perfect, and took a lot of trial and error to get a good plan going and learn the AI's moveset variants. I think its main weakness is that it doesn't account for hax like double team and OHKO users. My main way around that was basically to learn which pokes had the offending moves and gang up on them quickly before they could set up.
So yeah, I hope it helps a little or at least gives you some team inspiration.