This is my first Peer Edit, so any help will be appreciated. I am also surprised that there is no set that takes advantage of Blaziken's potential as a Mixed Sweeper, even though he is outclassed by Infernape. I first saw Astamatitos use this set and it worked for him, then soon I tried it and it gave me a potent revenge killer as well as a Mixed Attacker.
http://www.smogon.com/dp/pokemon/blaziken
[SET]
name: Choice Scarf MixiKen
move 1: Overheat / Fire Blast
move 2: Sky Uppercut
move 3: ThunderPunch
move 4: Hidden Power Ice
item: Choice Scarf
nature: Rash
evs: 76 Atk / 216 SpA / 216 Spd
ivs: 30 HP / 30 Def
[SET COMMENTS]
<p> Blaziken is an underrated mixed sweeper because of its average speed, which is remedied by a Choice Scarf. The moveset above gives the best coverage. Thunderpunch will 2HKO the standard Bulky Gyarados with Stealth Rocks. The Fire-type move and Sky Uppercut both benefit from STAB. Sky Uppercut can also 2HKO max HP and max Defense Bold Blissey. Hidden Power Ice will OHKO most Dragons and Grounds like Gliscor and Garchomp (if they aren't carrying Yache Berry). </p>
<p> Overheat is recommended over Fire Blast for the extra power and since this Blaziken is played as a hit and run Pokemon, the Special Attack drop won't matter as much but if you are really worried about the Special Attack drop, use Fire Blast. The EVs give you a 295 Attack stat, a 340 Special Attack stat, and a 375 Speed stat. With the 375 Speed, you can outspeed Weavile, neutral base 125 Pokemon, and anything lower. </p>
<p> This Blaziken is an effective physical wall breaker over the physical Blaziken sets. Overheat does up to 80% to Hippowdon, while Flare Blitz only does up to 36%. Overheat OHKOs Skarmory, and has a shot to OHKO even Bronzong. The ability to OHKO all of the OU Dragons and Gliscor, which no physical set can boast. </p>
http://www.smogon.com/dp/pokemon/blaziken
[SET]
name: Choice Scarf MixiKen
move 1: Overheat / Fire Blast
move 2: Sky Uppercut
move 3: ThunderPunch
move 4: Hidden Power Ice
item: Choice Scarf
nature: Rash
evs: 76 Atk / 216 SpA / 216 Spd
ivs: 30 HP / 30 Def
[SET COMMENTS]
<p> Blaziken is an underrated mixed sweeper because of its average speed, which is remedied by a Choice Scarf. The moveset above gives the best coverage. Thunderpunch will 2HKO the standard Bulky Gyarados with Stealth Rocks. The Fire-type move and Sky Uppercut both benefit from STAB. Sky Uppercut can also 2HKO max HP and max Defense Bold Blissey. Hidden Power Ice will OHKO most Dragons and Grounds like Gliscor and Garchomp (if they aren't carrying Yache Berry). </p>
<p> Overheat is recommended over Fire Blast for the extra power and since this Blaziken is played as a hit and run Pokemon, the Special Attack drop won't matter as much but if you are really worried about the Special Attack drop, use Fire Blast. The EVs give you a 295 Attack stat, a 340 Special Attack stat, and a 375 Speed stat. With the 375 Speed, you can outspeed Weavile, neutral base 125 Pokemon, and anything lower. </p>
<p> This Blaziken is an effective physical wall breaker over the physical Blaziken sets. Overheat does up to 80% to Hippowdon, while Flare Blitz only does up to 36%. Overheat OHKOs Skarmory, and has a shot to OHKO even Bronzong. The ability to OHKO all of the OU Dragons and Gliscor, which no physical set can boast. </p>