I'm not amazing with suggestions, but these would work well in my opinion:
Arcanine: The Life Orb would be good for this, as it seems to be built to hit hard and fast.
You should probably run Flare Blitz over Heat Wave, and Iron Head or Crunch over Dragon Pulse.
Typhlosion: This should probably have a Choice Scarf (or Specs) to give it a boost. You should probably run Extrasensory (or Hidden Power Grass, if possible.) over Earthquake so it's fully special.
Togekiss: This should hold the Leftovers, so it can regain some HP each turn. Or maybe an Expert Belt for increased SE damage. Also, run Flamethrower or Shadow Ball over Hyper Beam.
Vaporeon: Vapor should hold the Leftovers so it can regain HP each turn as it's a Bulky Pokémon. Run Ice Beam over Blizzard, and use Protect or Toxic over Waterfall.
Ampharos: Ampha's a Bulky Pokémon, so it should probably have the Leftovers. Or maybe the Wise Glasses to increase it's Special Moves. You should probably have Thunder Wave or Focus Blast over Iron Tail.
Jumpluff: If you're alright with replacing this Cottonpuff, then maybe use Breloom instead? Breloom's a good Physical Attacker (which the team is lacking), and also a Grass type.
It should probably have: Spore, Brick Break / Drain Punch, Swords Dance, and Seed Bomb. Make it hold the Focus Sash as Breloom is frail and needs to at least get a Spore off on something.
If these items are too hard to get, you can use any of these on your team:
-Type effectiveness Berries
They aren't that good, but they might let one of your team members live a hit they may not live without it.
-Sitrus / Lum Berry
The Sitrus Berry is actually a good item in actual competitive too, so this isn't a bad idea, as your Pokémon may need a HP boost. The Lum Berry is just in case of Pokémon that like to inflict Statuses.
This is a good item for any slow Pokémon (like Vaporeon and Ampharos) to use so they can maybe hit first and KO something.
-The Elemental Plates
These generally aren't the best, but they're decent if you can't get anything better.
Hope I helped in some way!~