All credit for this set goes to Flamewheeler (I grabbed the set from here and tested it, I hope you don't mind that I wrote up the analysis).
Once twashley, Colonel_Marcus, or another mod would like this set to be merged with j. franky's full revamp, feel free to do so.
http://www.smogon.com/dp/pokemon/venusaur
[SET]
name: Mixed Attacker
move 1: Sludge Bomb
move 2: Power Whip
move 3: Sleep Powder
move 4: Synthesis / Leech Seed
item: Life Orb
nature: Mild
evs: 64 HP / 164 Atk / 96 SpA /184 Spe
[SET COMMENTS]
<p>Venusaur adopts a tried and true method of sweeping with this set: cripple the foe with status and attack while it's immobilized. Sludge Bomb and Power Whip are your two STAB attacking options. Sleep Powder provides Venusaur with the safety net it and its teammates enjoy. Synthesis keeps Venusaur healthy from Life Orb recoil while also refreshing it after weathering a few blows. Leech Seed is another recovery option available to Venusaur that becomes extremely effective with this set; this Venusaur can 2HKO Clefable and deal huge blows to opposing Grass-types, the most common counters to Leech Seed.</p>
<p>The EV spread is designed to milk as much out of Venusaur as possible. The Attack EVs guarentee 2HKOs on Slowbro and Chansey with Power Whip, while the Special Attack EVs grant Venusaur a clean OHKO on Sceptile and other Grass-types who may try to wall this set. The Speed EVs allow Venusaur to outrun Adamant Honchkrow if the need arises, but know that Sucker Punch will still do a hefty amount of damage should your opponent choose that attack over Brave Bird. Alternatively, this set can sacrifice the HP and four Attack EVs and maximize Speed, keeping the likes of Feraligatr, Blaziken, and other Venusaur from outpacing Venusaur.</p>
<p>Unlike many other sets, this Venusaur will have troubles against Substitute + Calm Mind Raikou. Therefore, it is recommended that you either pair Venusaur up with a Pokemon who is able to do this job or substitute Earthquake for Power Whip. Pokemon that would satisfy the first option include threats such as Encore Clefable or Donphan. Clefable can come in on the turn Raikou starts setting up and Encore it to lock it into a useless Calm Mind or HP draining Substitute, while Donphan can choose to either threaten with Earthquake or phaze with Roar.</p>
<p>Although Sleep Powder does give it problems, Cresselia walls this set effectively, thanks to its huge defenses. Calm Mind makes Power Whip Venusaur's only effective attack to combat Cresselia with, although boosted STAB Psychics will be ending Venusaur in short order. Therefore, most people pair Venusaur up with Dark-types who are capable of overtaking Cresselia. Absol sees the most use as a Cresselia counter, and its immunity to Psychic attacks makes it an even better choice to pair up with Venusaur. Swords Dance and Night Slash or Sucker Punch easily puts huge dents in the new UU addition, mitigating its effectiveness for the rest of the battle.</p>
<p>Unfortunately, both Venusaur and Absol hate status, meaning Aromatherapy support is very much enjoyed. Clefable, Miltank, and Altaria are all capable of providing this service to your team, but for type synergy with both Absol and Venusaur, Altaria is probably your best choice. Altaria resists Fighting- and Fire-type attacks, although it does share a common Ice-type weakness with Venusaur. As always, entry hazards are also appreciated.</p>
Once twashley, Colonel_Marcus, or another mod would like this set to be merged with j. franky's full revamp, feel free to do so.

http://www.smogon.com/dp/pokemon/venusaur
[SET]
name: Mixed Attacker
move 1: Sludge Bomb
move 2: Power Whip
move 3: Sleep Powder
move 4: Synthesis / Leech Seed
item: Life Orb
nature: Mild
evs: 64 HP / 164 Atk / 96 SpA /184 Spe
[SET COMMENTS]
<p>Venusaur adopts a tried and true method of sweeping with this set: cripple the foe with status and attack while it's immobilized. Sludge Bomb and Power Whip are your two STAB attacking options. Sleep Powder provides Venusaur with the safety net it and its teammates enjoy. Synthesis keeps Venusaur healthy from Life Orb recoil while also refreshing it after weathering a few blows. Leech Seed is another recovery option available to Venusaur that becomes extremely effective with this set; this Venusaur can 2HKO Clefable and deal huge blows to opposing Grass-types, the most common counters to Leech Seed.</p>
<p>The EV spread is designed to milk as much out of Venusaur as possible. The Attack EVs guarentee 2HKOs on Slowbro and Chansey with Power Whip, while the Special Attack EVs grant Venusaur a clean OHKO on Sceptile and other Grass-types who may try to wall this set. The Speed EVs allow Venusaur to outrun Adamant Honchkrow if the need arises, but know that Sucker Punch will still do a hefty amount of damage should your opponent choose that attack over Brave Bird. Alternatively, this set can sacrifice the HP and four Attack EVs and maximize Speed, keeping the likes of Feraligatr, Blaziken, and other Venusaur from outpacing Venusaur.</p>
<p>Unlike many other sets, this Venusaur will have troubles against Substitute + Calm Mind Raikou. Therefore, it is recommended that you either pair Venusaur up with a Pokemon who is able to do this job or substitute Earthquake for Power Whip. Pokemon that would satisfy the first option include threats such as Encore Clefable or Donphan. Clefable can come in on the turn Raikou starts setting up and Encore it to lock it into a useless Calm Mind or HP draining Substitute, while Donphan can choose to either threaten with Earthquake or phaze with Roar.</p>
<p>Although Sleep Powder does give it problems, Cresselia walls this set effectively, thanks to its huge defenses. Calm Mind makes Power Whip Venusaur's only effective attack to combat Cresselia with, although boosted STAB Psychics will be ending Venusaur in short order. Therefore, most people pair Venusaur up with Dark-types who are capable of overtaking Cresselia. Absol sees the most use as a Cresselia counter, and its immunity to Psychic attacks makes it an even better choice to pair up with Venusaur. Swords Dance and Night Slash or Sucker Punch easily puts huge dents in the new UU addition, mitigating its effectiveness for the rest of the battle.</p>
<p>Unfortunately, both Venusaur and Absol hate status, meaning Aromatherapy support is very much enjoyed. Clefable, Miltank, and Altaria are all capable of providing this service to your team, but for type synergy with both Absol and Venusaur, Altaria is probably your best choice. Altaria resists Fighting- and Fire-type attacks, although it does share a common Ice-type weakness with Venusaur. As always, entry hazards are also appreciated.</p>