I haven't been in Ubers for a while...
EVs: 252 Sp. Atk, 200 Sp. Def, 56 HP
Item: Choice Scarf
EVs: 252 Atk, 252 Speed, 4 HP
EVs: 252 Def, 252 Sp. Def, 4 Sp. Atk
Thunder wave/ Toxic
I would have gone for Dragon Tail, but that doesn't break substitutes.
EVs: 252 Sp. Atk, 252 speed, HP Speed
Ice Beam/ Heal Bell (team support?)
Item: Life Orb
EVs: 252 Sp. Atk, 252 Speed, 4 HP
Focus Blast (Dark Pulse? I don't like the 70% accuracy of Focus Blast, even if it'll provide wider coverage)
I'm not sure what to fill my last space with; an Excadrill w/ Sand Rush to cover for Sand Teams? Or Blissey for support?