With the dual screen strategy it's safe to say that a full hyper offensive team would be better, or at least that's what i think :]
I'll start changing Espeon's EVs with these:
@ Light Clay
Ability: Magic Bounce
EVs: 236 HP / 44 Def / 4 SpA / 4 SpD / 220 Spe
Timid Nature
IVs: 0 Atk
- Yawn
- Psychic
- Reflect
- Light Screen
EVs are to outspeed Adamant Mence, and to have as much bulk as possible
(survives outrage from chomp for example). You won't need special attack since you need bulk on the dual screen setter or common mons such as Scarf Chomp or Tapu Koko will end up killing it, leaving you 2 vs 3 from the very beginning.
Going on, i like that
Blaziken, it works pretty well behind the screens. Also, even not being a fan of it, Azumarill can work with this strategy too, and since you have no spread on it i'll add a standard set down here, changing it to a Sitrus BD set to not stack with the other Z:
@ Sitrus Berry
Ability: Huge Power
EVs: 228 HP / 252 Atk / 12 Def / 12 SpD / 4 Spe
Adamant Nature
- Belly Drum
- Aqua Jet
- Play Rough
- Waterfall / Knock Off
Now your team would be like: Espeon / Blaziken / Azumarill.
At this point your team struggles in front of bulky Water-types.
Tapu Koko would be great for the team, but its Fairy-type would be a little redundant with Azu's, so we can either
Add Koko and remove Azu for Mega Gyarados, that is a fantastic choice with this strategy and would also act as a switch in for Ground-type attacks,
or keep Azumarill and add Thundurus-T and Mega Gengar.
@ Gyaradosite
Ability: Intimidate
Level: 50
EVs: 84 HP / 236 Atk / 4 Def / 12 SpD / 172 Spe
Jolly Nature
- Waterfall
- Ice Fang
- Earthquake
- Dragon Dance
This is a pretty standard spread for Gyarados with the screens. It hits 202 Speed after a DD outspeeding base 130 and it outspeeds Breloom without before the boost.
@ Electric Seed
Ability: Electric Surge
Level: 50
EVs: 92 HP / 4 Def / 156 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Thunderbolt
- Hidden Power [Ice] / Dazzling Gleam
- Grass Knot
- Calm Mind
Behind Reflect it survives GRound-Z from Excadrill and Chomp. Regular Earthquake is a 3HKO, even PJab from Life Orb Pheromosa is a 3HKo.
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@ Z something, Life Orb, or Sitrus.
Ability: Volt Absorb
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Thunderbolt
- Hidden Power [Ice]
- Focus Blast
- Nasty Plot
Fight Z is great on it, for example +2 Z Focus Blast can OHKO Chansey, making it a fantastic wallbreaker. Even Elec Z is pretty solid on it, but you don't want to use 2 Z mons also Life Orb or Sitrus Berry are options.
Speaking fairly, behind the screens you could even use a totally different set with
Agility a Life Orb and 3 attacks, imo. But the first one is the standard.
@ Gengarite
Ability: Cursed Body
Level: 50
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Sludge Bomb
- Hex
- Substitute
- Hypnosis
Casinogar. Works fine with Espeon's Yawn and can easily fire its Hypnosis if guarded by the dual screens.
As for the Last mon, maybe you could use a mon that can give you a way to lead the team if Espeon could fare a tough match up when. For example if you see opposing Mega Gengars.
Specially Defensive Hippowdon could fit, by both helping Gengar with Yawn, your setup sweepers and with the matchup said above.
@ Sitrus Berry / Lum Berry
Ability: Sand Stream
Level: 50
EVs: 252 HP / 4 Def / 252 SpD
Careful Nature
- Earthquake
- Stealth Rock
- Yawn
- Whirlwind / Rock Tomb
So in the end the team would be like this: Espeon / Blaziken / Tapu Koko / Gyarados / Hippowdon + something defensive such as
Ferrothorn, that would help even more vs Water-types and offer a switch in for those and for Electric-types.
or
Espeon / Blaziken / Thundurus / Azumarill / Mega Gengar / Hippowdon
Hope this will help.