I've been experimenting for some time with the following Blaziken set:
Blaziken@Leftovers
Speed Boost
Impish
252 HP / 148 Atk / 80 Def / 28 Spe
Protect
Swords Dance
Hi Jump Kick
Shadow Claw
Before you laugh your ass off, let me tell you this is by no means is meant to be bulky. It is meant to survive priority moves. Impish and 252 HP / 80 Def guarantee you survive an Aqua Jet from CB Azumarill after Stealth Rock damage, which is probably the strongest priority you'll ever face.
Come in mid to late game on something choiced or something that can't touch you and Swords Dance up. Generally, a none boosted, none SE physical move won't OHKO you, giving you another chance to set up SD.
Hi Jump Kick and Shadow Claw provide marvelous coverage. Shadow Claw takes care of Lati@s/Pringles at +4, who think they can end your sweep.
28 speed EVs nets you 203 speed stat, which hits 406 after two speed boosts, allowing you to out pace Pokemon who possess 404 speed (via Choice Scarf or Swift Swim). Rest in attack.
Of course, this isn't unstoppable, many things stop it cold, and status really hurts its survivability, but when used correct it can net you an effective sweep.