Is this team good?

So I'm trying to create a "perfect league challenging team"....... This would be it.
Lanturn (in testing)
(Xatu) (F) @ Leftovers
Trait: Magic Bounce
EVs: 212 Def / 128 SDef / 168 Spd
Bold Nature (+Def, -Atk)

Milotic (F) @ Flame Orb
Trait: Marvel Scale
EVs: 252 HP / 252 Def
Bold Nature (+Def, -Atk)

Volcarona (M) @ Focus Sash
Trait: Flame Body
EVs: 252 SAtk / 252 Spd
Modest Nature (+SAtk, -Atk)

Electivire (F) @ Life Orb
Trait: Motor Drive
EVs: 252 Atk / 252 Spd
Adamant Nature (+Atk, -SAtk)
e

Gengar (F) @ Focus Sash
Trait: Levitate
EVs: 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)

It's meant to be overpowered, BTW.