A cheap tactic I use in doubles is Anger Point Taurus, and frost breath Froslass.
Froslass @ Focus Sash
252 HP / 252Spd / 4 Def
Jolly Nature
-> Frost breath
-> Destiny Bond
-> Protect
-> Substitute
Tauros @ Life Orb
252 Atk / 248 Spd / 8 HP
Jolly nature
-> Rock Slide
-> Earthwuake
-> Double Edge
-> Pursuit/Zen Headbutt
Okay, Tauros has 1 less speed than Froslass, so she uses frost breath turn one, raising tauros attack by 4x, then tauros sweeps with Earthquake or Rockslide. It's fairly reliable. But requires strong team mates for if it gets countered (by Mach Punch or any strong priority move. Or even fast sweepers, you can get choice scarfers in the subway, I believe)