Sorry for the double post. I made some modifications to the Life Orb set I posted before.
[SET]
name: Life Orb
move 1: Hammer Arm
move 2: Shadow Sneak/ Shadow Punch
move 3: Power Whip/ Ice Punch
move 4: Moonlight/ Rest
item: Life Orb
ability: Air Lock/ Shed Skin
nature: Adamant
evs: 252 HP / 252 Atk / 4 Speed
[SET COMMENTS]
With the given EVs and Life Orb, Revenankh reaches 440 attack. This set has a very similar feel to a MixMence carrying Roost. Hammer Arm is your standard Fighting move, and is non-negotiable. Shadow Sneak vs. Shadow Punch comes down to who your team fears more: Gengar or Celebi. Power Whip is to cover Bulky Waters and Grounds like Suicune, Vaporeon, Hippowdon, and Donphan, who aren't hit that hard by Hammer Arm. It also doesn't leave you helpless against Gyarados. Ice Punch is for fliers and Dragons, giving Revenankh complete coverage against its weaknesses.
Both Rest and Moonlight are on this set, but I'll explain why I believe Moonlight is the superior form of healing here. First of all, Revenankh is a rather bulky Pokemon, and its ability to take hits and still dish out considerable damage is what makes it stand out amongst other more frail LO users. In the ever-present Sandstorm of OU, you really don't want to be losing 16% of your health each round. Also, unlike the Bulk Up set, the lack of investment in defense means that you really can't risk taking too many hits while sleeping. However, if your team lacks a way to absorb status moves, Revenankh can work as a pseudo status absorber with ShedRest.
Below are some damage calcs for the set:
Hammer Arm vs. Standard Blissy: 100%
Hammer Arm vs. Supporter Bronzong: 52% - 62%
Shadow Punch vs. Bold, 252HP/220Def Celebi: 45% - 53%
Hammer Arm vs. Forretress: 36% - 43%
Ice Punch vs. Garchomp: 100%
Hammer Arm vs. Garchomp: 59% - 69%
Shadow Sneak vs. Standard Gengar: 95% - 100%
Ice Punch vs. Standard Gliscor: 71% - 84%
Power Whip vs. Buly Gyarados: 41% - 49%
Power Whip vs. 252HP/252Def Hippowdon*: 50% - 58%
Hammer Arm vs. Skarmory°: 37 - 43%
*It'll only do more damage to other Bulky Waters and Grounds weak to Grass.
° Considering you're slower, Skarmory will go down the moment it uses Roost. This just shows that Skarmory can't switch into a Hammer Arm and Roost off the damage. Watch out for Brave Bird obviously.
That's enough for now. If people are interested I'll do more calcs.
EDIT: Also Yanmega is definitely a counter with 86HP/86Def, a quad Fighting and Grass resistance, and the major threat it poses with Air Slash.