building a competitive team

[Rogue]

I went ahead and changed some things around, along with showing the abilities I think you should try to get.


Espeon @ Leftovers
Ability: Magic Bounce
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Calm Mind
- Psyshock
- Morning Sun
- Dazzling Gleam

You want Psyshock over Psychic for many reasons, but mostly to deal with things like calm mind Suicune to keep it short and sweet. I kept it calm mind to keep it similar to what you wanted, and gave it recovery out of morning sun. This could be changed to a filler attack.

Noivern @ Choice Specs
Ability: Infiltrator
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Draco Meteor
- Hurricane
- Flamethrower
- U-turn

Really disagree with rocky helmet on Noivern. Noivern is really fragile and you should focus on hitting hard and fast, u turn can be swapped out for a 4th move; i just like u turn for switch initiative.

Nidoking (M) @ Life Orb
Ability: Sheer Force
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Earth Power
- Sludge Wave
- Ice Beam
- Stealth Rock

Simple nidoking set, you should try to get sheer force for incredible power. Put on stealth rocks for hazards.

Arcanine @ Rocky Helmet
Ability: Intimidate
EVs: 248 HP / 8 Atk / 252 Def
Impish Nature
- Morning Sun
- Will-O-Wisp
- Flare Blitz
- Extreme Speed

Went for the simple bulky arcanine set since you needed some physically defensive mons, and used rocky helmet more effectively here.

Ampharos @ Ampharosite
Ability: Static
EVs: 32 HP / 252 SpA / 224 Spe
Timid Nature
IVs: 0 Atk
- Thunderbolt
- Dragon Pulse
- Focus Blast
- Agility

Went for agility mega fabio, because you should try keeping its strength and we still want it to be fast. I would do a sleep talk variant, but you already have bulky arcanine/lanturn

Lanturn @ Assault Vest
Ability: Volt Absorb
EVs: 252 SpA / 144 SpD / 112 Spe
Modest Nature
IVs: 0 Atk
- Scald
- Thunderbolt
- Volt Switch
- Ice Beam

simple assault vest lanturn, for special attackers.

I kept this short and simple mostly because I have to leave for work, but I hope this helps.
My concern with the team is that you have ground weaknesses, and your ground immunity is noivern, who is very fragile.