1 Hit KOs moves are TERRIBLE. You're better off using moves with more accuracy but good power.
Pursuit's only great if you use it on a fleeing Ghost or Psychic... ._.
Steel Wing is a terrible move, and Brave Bird is a lot better than Drill Peck.
Anyhow, to your team.
Rock Slide > Outrage on Sceptile. It hates Flying types, so Rock Slide is a lot better than Outrage.
I'm not really liking that Latias set. It's walled by the Magne- family as well as Shedinja. You're better off Dragon Pulse, Thunderbolt, Surf, and Hidden Power Fire on Latias. If you can't get Hidden Power Fire get Psychic, I guess. Just be sure to make it hold a Soul Dew to boost it's Sp.A (This isn't competitive, so Soul Dew isn't banned).
Houndoom doesn't have a great set. Nasty Plot > Will-O-Wisp, to boost it's Sp.A. Fire Blast is fine, replace Overheat with Dark Pulse. Crunch can stay I guess, but if you don't want Water types killing you go with HP Grass. You could also use Sucker Punch in it's place (Just know how it works).
Manetric is outclassed by Jolteon and even Raikou IMO. Jolteon is best off with Thunderbolt, Shadow Ball, HP Grass/Signal Beam (If you can't get one, get the other) and a filler move. If you want to keep Manetric, use the set suggested by pkmntrainerpaul, I guess. I don't know a good set for Manetric. But add something else instead of Rain Dance, it's not doing much.
Recover > Hypnosis. You could use Hydro Pump, but if you don't like the acuraccy use Surf. Ice Beam > Blizzard. Rain Dance isn't doing much once again, sos carp that for either HP Grass or Toxic.
Skarmory isn't very good in game, but if you want to use him go ahead. Spikes could be used over Toxic. Keep Brave Bird, Fly isn't a very good move because it allows others to set up and Drill Peck is pretty meh. Don't use Steel Wing. I cannot stress how much you shouldn't. It's probably one of the worst moves in the game. Use Roost for some healing. Protect could be replaced with Whirlwind, but I don't find that very good in game, so yuo're better off using Protect to scout for powerful Special moves coming your way so you can switch on the AI and beat whatever's trying to hit Skarmory.
Add natures, EVs, items, etc and I can rate more.