Assassination (19 points)
* Malice (5/5) - Increases crit chance by 5%. No reason not to take this.
* Ruthlessness (3/3) - Gives your finishing moves a 60% chance to add a combo point to the target. A great talent that helps with combo point generation.
* Murder (2/2) - Increases damage done to 4 different types of mobs by 2%.
* Relentless Strikes (1/1) - Your finishing moves have a 20% chance per combo point to give you 25 energy. More energy means more attacks and more finishers, so anything that gives you energy is a good thing.
* Lethality (5/5) - Increases the critical damage of many of your special attacks by 30%. Bigger crits means more damage, so don't pass this one up.
* Vile Poisons (3/5) - Increases the damage of your poisons and Envenom by 12% and an additional 24% for them to be dispelled. For this build, I wouldn't recommend using Envenom because you'll lose your 5 stack, but it will increase the damage of your poisons. Alternatively, on raids where mobs are immune to poison, you can consider putting these 3 points in Improved Eviscerate instead.
Combat (42 points)
* Improved Gouge (3/3) - Increases the duration of Gouge by 1.5 seconds. Has its occasional uses, but if you find yourself opposed to this on principle, take 3 points in Lightning Reflexes instead.
* Improved Sinister Strike (2/2) - Decreases the Energy cost of Sinister Strike by 5. As you'll be using Sinister Strike as your primary attack, this is a critical talent.
* Improved Slice and Dice (3/3) - Increases the duration of Slice and Dice by 45%. SnD grants you 30% haste, and this talent almost doubles the amount of time that it's up. Don't miss this one, as it's also necessary to maintain Combo Point cycles.
* Precision (5/5) - Increases your chance to hit by 5%. Very useful for helping you to get to the hit cap.
* Improved Sprint (2/2) - I like Improved Sprint over Endurance because it removes snares, which is often useful, but place these 2 points anywhere you like.
* Dual Wield Specialization (5/5) - Increases the damage done by your offhand by 50%. This brings the damage penalty to your offhand weapon down to 25% (from 50%), so pick this one up.
* Blade Flurry (1/1) - Increases attack speed by 20% and causes your attack to also hit a 2nd nearby target for 15 seconds. Use this often -- anything that increases your attack speed is fantastic.
* Sword Specialization (5/5) - Gives you a 5% chance to get an extra attack on the same target. The extra sword swing comes from your main hand, but a sword in your offhand can also proc an extra main hand attack.
* Weapon Expertise (2/2) - Increases expertise by 10. Decreases the chance your target will dodge or parry your attack by 2.5% -- yet another great talent.
* Aggression (3/3) - Increases the damage of Sinister Strike, Backstab and Eviscerate by 6%. Every bit helps, and since we're going further into the tree anyway you should definitely pick this up.
* Vitality (2/2) - Increases your stamina by 4% and your agility by 2%. A small bonus, but a bonus nonetheless.
* Adrenaline Rush (1/1) - Grants you 100% increases energy regeneration for 15 seconds. Still a great talent, as it potentially doubles your damage output from special attacks while it's up.
* Nerves of Steel (2/2) - Increases resistance to Stun and Fear by 10%. There are many mobs and bosses that can do both, and maintaining control of your character is generally preferable to running around aimlessly or being stuck in one spot.
* Combat Potency (5/5) - Gives your offhand attacks a 20% chance to generate 15 energy when they land. An amazing talent, and only gets better the closer you get to the hit cap. Many rogues like to run with a fast weapon in their offhand to maximize the chance that this procs. Using Shiv can also cause this to proc, but it's generally not worth the energy expenditure.
* Surprise Attacks (1/1) - Your special attacks can no longer be dodged, and increases the damage of Sinister Strike, Backstab, Gouge and Shiv by 10%. Don't pass this up, it's absolutely worth it.