Rate my OU mixed team

Question

Tutu Queen (Mandibuzz) @ Rocky Helmet
Ability: Overcoat
Level: 50
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
- Defog
- Taunt
- Roost
- Foul Play

Mandibuzz is my physical wall and phazer. I would give it leftovers, but I don't have another one. Defog to remove hazards, roost to heal up (obviously), taunt to stop other pokemon from setting up, and with its speed can stop most walls.

Edison (Lanturn) (M) @ Leftovers
Ability: Volt Absorb
Level: 50
EVs: 248 HP / 8 SpA / 252 SpD
Calm Nature
- Heal Bell
- Thunder Wave
- Scald
- Volt Switch

Lanturn works very well with mandibuzz, as it resists all but one of mandibuzz's weakness. He has heal bell which is very beneficial for my team removing burns and poison. It can slow down threats, and switch with volt switch.

Noodles (Mienshao) (M) @ Life Orb
Ability: Regenerator
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Jolly Nature
- Drain Punch
- U-turn
- Fake Out
- Knock Off

Mienshao resists the weakness of mandibuzz that lanturn doesn't cover, which in turn mandibuzz/lanturn cover 2/3 of its weaknesses. If it can't take something out it can switch while wittling the opposing pokemon.

Panzer (Metagross) @ Assault Vest
Ability: Clear Body
Level: 50
EVs: 252 HP / 252 Atk / 4 SpD
Adamant Nature
- Bullet Punch
- Zen Headbutt
- Earthquake
- Meteor Mash

Since mienshao isn't the bulkiest pokemon around, I chose metagross to patch up mandibuzz's rock weakness. It also covers the fairy weaknesses. Metagross can switch in with its bulk and dish a lot of damage back.

Prada (Gardevoir-Mega) (F) @ Gardevoirite
Ability: Pixilate
Level: 50
Shiny: Yes
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Focus Blast
- Psyshock
- Hyper Voice
- Energy Ball

At this point I was having trouble finding my next pokemon. But I chose mega gardevoir because its typing works well with the pokemon I have. It does add another ghost weakness. Calm mind would be nice.

Rotom (Rotom-Heat) @ Sitrus Berry
Ability: Levitate
Level: 50
EVs: 252 HP / 252 SpA/ 4 Spd
Modest Nature
- Overheat
- Thunderbolt
- Volt Switch
- Will-O-Wisp

I finally chose rotom-h for my last pokemon. Another pokemon to resist the fairy type, and immune to ground. His weaknesses are covered by the team, and he can take out his fair share of pokemon. Stab fire and electric make him a dangerous foe, while being able to nullify physical threats. Volt Switch enables switch initiative.

Comments

I'm not sure what you mean by "OU Mixed", but I'm assuming you mean a mix of OU and other tiers. If this is the case, most of these 'Mons are outclassed by other Pokémon in OU. I'd suggest switching to these ones:

Mandibuzz = Good, doesn't need to change
Lanturn < Rotom-W
Mienshao < Mega Lopunny, Conkeldurr, etc. (basically any OU Fighting-type)
Metagross < Ferrothorn, Bisharp, etc. (basically any OU Steel-type)
Mega Gardevoir = Good, doesn't need changing.
Rotom-H ≠ Unsure. Rotom-H can function under certain circumstances, but I'm not sure what to change it with. Perhaps a spinner/defogger like Excadrill or Zapdos.

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Meinshao has speed and acess to U-Turn for picking up momentum as well as being able to hit harder with the Life Orb. Although you can always use Baton Pass on Mega Lopunny if you want to use it and still be able to make momentum. But you already have Lanturn and Rotom for that, so I would give Mega Lopunny a try.
Lanturn is fine imo to be used over Rotom. Not sure how many people would know what to exepct out of a Lanturn in OU, espacially since it carries Heal Bell.