[RATE MY TEAM] Need help, Rate my team!

[Colette]

Hey so I kinda started going into competitive battling and need some input on my team. I'm leaning more towards OU.
Here's my current team: Win : Loss ratio : 20:1

Pokemon: Landorus-T @choice scarf
Nature: Adamant
Ability: Intimidate
EVs: 252 Atk / 4 Def / 252 Spe
Moves:
-U-turn
-Superpower (May change to knock off or stealth rock)
-Earthquake
-Rock slide
Landorus is a good entry as it lowers the opponent's attack, and i'm able to deal some damage by U-turning out preventing the opponent from dealing some damage to it. It also does some nice damage to M-Metagross which is not too common, but can be deadly if not prepared.

Pokemon: Azumarill @Assault Vest
Nature: Adamant
Ability: Huge power
EVs: 228 HP / 252 Atk / 12 Def / 12 SpD / 4 Spe
Moves:
-Waterfall
-Play rough
-Knock off
-Aqua jet
Azumarill also takes out other opposing Lando-Ts easily with waterfall while play rough can help deal some nice damage as it provides good power and coverage. Aqua jet is there to finish of some pokemon that are left with a little bit of HP.

Pokemon: Jolteon @choice specs
Nature: Timid
Ability: Volt absorb
EVs: 252 SpA / 4 SpD / 252 Spe
Moves:
-Thunderbolt
-Signal beam
-Hidden power grass
-Volt switch
Jolteon is in here to take care of rotom-w which i've been seeing a lot lately. If something doesn't go according to plan, I can safely volt switch out.

Pokemon: Lopunny @Lopunnite
Nature: Jolly
Ability: Limber
EVs: 252 Atk / 4 Def / 252 Spe
Moves:
-Fake out
-High jump kick
-Return
-Ice punch
Lopunny is my mega because it's able to sweep gliscor, lando-T, and etc..

Pokemon: Talonflame @Choice Band
Nature: Adamant
Ability: Gale Wings
EVs: 252 Atk / 4 Def / 252 Spe
Moves:
-Brave bird
-flare blitz
-U-turn
-Me First
I put in talon flame so that it can take out M-Alakazam, and M-Medicham, and deal some decent damage to rotom. There was no use for roost since once Talonflame is locked into brave bird, there's really nothing else I can do, which is why I put in Me first to help deal with the annoying dragonite before it can kill using outrage.

Pokemon: Aegislash @Weakness policy
Nature: Adamant
Ability: Stance change
EVs: 252 HP / 252 Atk / 4 SpD
Moves:
-Shadow sneak
-Sacred sword
-Iron head
-King's Shield
This set was chosen because king's shield protects aegislash while dropping the opponent's attack and provides more chances at staying in by reverting to it's shield form. Shadow sneak can pick off weaker pokemon while sacred sword can take out heatran, and ferrothorn. Iron head is there to take care of fairy types such as sylveon.

Any input would be great, if you need more details i'd be glad to share (Or add it on the list)  I especially need help on which pokemon would be better fit for my team. Thank you for your time!