I saw VIL using a really cool mixed Houndoom on his stall team (this thing says fuck you Rotom-h so great for stall teams) so I modified it a bit and I've had great results with it. My computer is being stupid and not letting me save this right now so that's basically why I'm posting this now since I have to leave in a bit. Will update.
http://www.smogon.com/dp/pokemon/houndoom
[SET]
name: MixDoom
move 1: Sucker Punch
move 2: Pursuit
move 3: Flamethrower / Fire Blast
move 4: Hidden Power Electric / Hidden Power Ground / Hidden Power Fighting
item: Expert Belt / Life Orb
ability: Flash Fire
nature: Mild
evs: 80 Atk / 212 SpA / 216 Spe
[SET COMMENTS]
<p>With Houndoom's excellent base 110 Special Attack stat, many will often overlook Houndoom's quite respectable base 90 Attack stat. The primary reason to make use of Houndoom's Attack stat is because of its access to STAB Sucker Punch and Pursuit, allowing it to be an effective revenge killer for weakened foes and the Ghosts and Psychics of the tier. While it does require some prediction to use properly, if you can predict correctly whether to use Sucker Punch or Pursuit, Houndoom can make an excellent revenge killer. Flamethrower or Fire Blast complements the set for a STAB Fire option and the Hidden Power of choice is for coverage. Electric helps to take on Water Pokemon, excluding Starmie who will take more damage from Sucker Punch, and Hidden Power Ground helps combat Heatran and Infernape. Hidden Power Fighting is your best option against Tyranitar and is a likely 2HKO against 252 HP Tyranitar with Stealth Rock.</p>
<p>216 Speed EVs allow Houndoom to outrun neutral nature base 90 Speed Pokemon such as Adamant Lucario and Modest Porygon-Z. 80 Attack EVs guarantee that maximum HP, maximum Defense Rotom-appliance is 2HKO'd by Sucker Punch or 2HKO'd by Sucker Punch and then Pursuit, if it attempts to switch; assuming Stealth Rock damage. Additionally, the 80 Attack EVs allow Houndoom to OHKO Azelf with Sucker Punch if it has taken Stealth Rock damage. The remaining EVs were delegated to Special Attack.</p>
http://www.smogon.com/dp/pokemon/houndoom
[SET]
name: MixDoom
move 1: Sucker Punch
move 2: Pursuit
move 3: Flamethrower / Fire Blast
move 4: Hidden Power Electric / Hidden Power Ground / Hidden Power Fighting
item: Expert Belt / Life Orb
ability: Flash Fire
nature: Mild
evs: 80 Atk / 212 SpA / 216 Spe
[SET COMMENTS]
<p>With Houndoom's excellent base 110 Special Attack stat, many will often overlook Houndoom's quite respectable base 90 Attack stat. The primary reason to make use of Houndoom's Attack stat is because of its access to STAB Sucker Punch and Pursuit, allowing it to be an effective revenge killer for weakened foes and the Ghosts and Psychics of the tier. While it does require some prediction to use properly, if you can predict correctly whether to use Sucker Punch or Pursuit, Houndoom can make an excellent revenge killer. Flamethrower or Fire Blast complements the set for a STAB Fire option and the Hidden Power of choice is for coverage. Electric helps to take on Water Pokemon, excluding Starmie who will take more damage from Sucker Punch, and Hidden Power Ground helps combat Heatran and Infernape. Hidden Power Fighting is your best option against Tyranitar and is a likely 2HKO against 252 HP Tyranitar with Stealth Rock.</p>
<p>216 Speed EVs allow Houndoom to outrun neutral nature base 90 Speed Pokemon such as Adamant Lucario and Modest Porygon-Z. 80 Attack EVs guarantee that maximum HP, maximum Defense Rotom-appliance is 2HKO'd by Sucker Punch or 2HKO'd by Sucker Punch and then Pursuit, if it attempts to switch; assuming Stealth Rock damage. Additionally, the 80 Attack EVs allow Houndoom to OHKO Azelf with Sucker Punch if it has taken Stealth Rock damage. The remaining EVs were delegated to Special Attack.</p>