I've had great success with this set
adamant/252 atk/252 Spe
gale wings
Item: leftovers
brave bird
flare blitz
roost
bulk up
I ran acrobatics for a bit but it just wasn't doing the job, so I swapped it for brave bird. Flare blitz is for steel types like mawile, scizor, etc and Roost is there...