this is what I would use myself
Skarmory (M) @ Red Card
Trait: Sturdy
EVs: 128 HP / 44 Def / 192 SDef / 144 Spd
Impish Nature (+Def, -SAtk)
Roost
Whirlwind
Spikes
Stealth rock
Serperior (M) @ wide Lens(Dragon tail wont miss)
Trait: Overgrow
EVs: 84 HP / 108 Atk / 60 Def / 64 SDef / 192 Spd
Impish Nature
Dragon Tail
Leaf Blade
Coil
Light Screen