Eeveelution Team Help

Yeah, since I want to do an Eeveelution team since that some people do in Random Matchup, I guess that I tried making one lately.

Modest Vaporeon@ Leftovers
Sp. DEF 200/ Sp. Atk 252/ DEF 60
Water Absorb
Scald
Toxic
Wish
Protect

Timid Espeon@ Sitrus Berry
Sp ATK 200/ Sp DEF 252/ DEF 60
Synchronize
Grass Knot
Calm Mind
Psyshock
Shadow Ball

Jolly Umbreon@ Tanga Berry
ATK 252/ Sp. DEF 200/ DEF 60
Synchronize
Payback
Curse
Wish/Moonlight
Toxic

Bold Jolteon@ Life Orb
DEF 252/ Sp. ATK 200/ Sp. DEF 60
Volt Absorb
HP Ice/Dragon
Shadow Ball
Thunder/Thunderbolt
Thunder Wave

Impish Flareon@ Fighting Gem/Air Balloon
DEF 252/ ATK 200/ Sp. DEF 60
Flash Fire
Superpower
Will-O-Wisp
Flame Charge
Quick Attack/Bite

Careful Leafeon@ Bug Gem
ATK 200/ SD 108/ Sp. DEF 202
Leaf Guard
Swords Dance
Leaf Blade
X-Scissor
Sunny Day/Synthesis

Vaporeon is best off with a bulky spread, since its movepool tends to lean towards the supporting end of things. The EV spread should be 248 HP/252 Def/8 SDef with a Bold nature.

Espeon's preferred ability is Magic Bounce as of Gen V. It can either support the team with Dual Screens or Baton Pass Calm Mind boosts, but it can take an offensive set if it wants:
-Reflect
-Light Screen
-Psychic/Psyshock
-Hidden Power (Fire)/Baton Pass
Nature: Timid
EVs: 252 HP/4 Def/252 Spe
Item: Light Clay
Ability: Magic Bounce

or
-Calm Mind
-Stored Power
-Hidden Power (Fighting)
-Baton Pass
Nature: Timid
EVs: 252 HP/4 SAtk/252 Spe
Item: Leftovers
Ability: Magic Bounce

or
-Calm Mind/Trick
-Psychic/Psyshock
-Shadow Ball/Signal Beam
-Hidden Power (Fighting)
Nature: Timid
EVs: 4 HP/252 SAtk/252 Spe
Item: Life Orb/Choice Specs
Ability: Magic Bounce

Umbreon is better off with a bulky spread to make the most out of its good defenses. While it can use Curse effectively, the many Fighting Pokemon out there make setting up difficult:
-Wish
-Payback/Foul Play
-Heal Bell/Toxic
-Protect
Nature: Careful
EVs: 252 HP/4 Def/252 SDef
Item: Leftovers

You're wasting Jolteon's incredible Speed and offensive capabilities here. It can't take a hit at all, even with investment:
-Thunderbolt
-Volt Switch
-Hidden Power (Fire/Ice)
-Signal Beam/Shadow Ball
Nature: Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Life Orb/Choice Specs
Ability: Volt Absorb

Flareon is the worst Eeveelution out of the seven, period. Its offensive movepool is very shallow and its low Speed doesn't help in that case. Despite its Stealth Rock weakness, Flareon can also pull off a support set, thanks to its high Special Defense:
-Wish
-Protect
-Flamethrower/Lava Plume
-Toxic/Roar/Heal Bell
Nature: Calm
EVs: 252 HP/4 Def/252 SDef
Item: Leftovers
Ability: Flash Fire

Leafeon is better off using Return over X-Scissor; even though Return hits other Grass Pokemon for less damage, but some, especially Amoonguss, take neutral damage from it due to their Poison typing, therefore inflicting less damage than Return would:
-Swords Dance
-Leaf Blade
-Return/Double-Edge/Substitute
-Baton Pass/Heal Bell
Nature: Jolly
EVs: 160 HP/124 Atk/224 Spe or 80 HP/252 Atk/176 Spe
Item: Leftovers

or
-Wish
-Protect
-Leaf Blade
-Yawn/Heal Bell
Nature: Impish
EVs: 252 HP/252 Def/4 SDef
Item: Leftovers
Ability: Leaf Guard

or
-Wish/Heal Bell
-Protect/Synthesis
-Roar
-Leaf Blade
Nature: Impish
EVs: 252 HP/252 Def/4 SDef
Item: Leftovers
Ability: Leaf Guard

Vaporeon takes most special attacks with ease. If you really want a Wall Vaporeon, you can use this.

Vaporeon @ Leftovers
Nature: Bold
Ability: Water Absorb
180 HP 252 Def 76 SpDef
-Scald
-Roar/Toxic
-Wish
-Protect

or if you want huge Wish heals, you can use 248 HP / 252 Def / 8 SpDef

It all depends whether you want to wall or heal.