Well, i did couple of tests 1-2 months ago as Assasination rogue.
This is what i found to work the best for me.
Weps and Enchants: Kryss MH / Lungebreaker OH, both beeing enchanted with Zerk.
Trinkets: STS > Herkumi > DBW
STS has no match... Herkumi is awesome cos the more u hit with melees, the more energy u get from Focused Attacks. DBW is great for fights where u need burst (if u know that fight will end at the end of 2nd DBW proc this trinket is beast).
Overall Stats: I forgot how much Hit i was running exactly, all i know is that u need 20%+ haste and 5k atk power (without buffs).
U need to work and make a perfect balance with gems when it comes to Hit and Crit, aswell as Armor Penetration.
I think i used Sindra 25m hc Neck, Gunship Cloak, Halion Wrist, PP Belt, Marrow Feet, Marrow Ring, Ashen Ring, Gunship Chest, 4/5, Herkumi, STS, Xbow from LK.
Talents:
http://talentcalc.deffender.eu/rogue...00000000000000
Reasons for them:
Vigor - u can never have enough energy cos u never know when u are going to Double Normal Hit that Mutilate. The more u have it, the better it will be when u get unlucky. Also, with this, and some lucky 4/5 T10 bonus proc when u get low on energy, can make u have a perfect chain of Envenom buff and actualy have it for the full duration of a fight, if u know how to Envenom. Overall i think its better than that last 1 point in Cut to the Chase.
Relentless Strikes - this makes u a better all arround DPS.
10% haste from combat can result in a higher single target DPS when BIS only, but 5/5 RS will give u a lot of extra energy that will result in higher Burst, on targets that need to die faster (adds), and higher AoE potential.
Cut to the Chase - 4/5 is more than enough. U dont need more, going less might end up badly if u are unlucky.
The basic rotation with this spec would be 4/5+ Combo Points Envenom, Muti (Muti again if >3 combo points on target), Envenom instantly when u lose the buff, repeat.
I think this spec would be better for people that are not BIS.
Overall, u will have to test a lot of stuff urself in order to find a perfect combination of items. I lack the time and some double items (so i dont **** up combat gear gemming) in order to come to a perfect build, but i might try it next week.
Edit:
http://imgur.com/a/A0qAG
Pic of todays DPS. I lack 6 agility cos of bad gemming. 3 yellow gems in chest and 2 red gems in feet (if i change it i will **** up my combat set), so i would be on 4900 atk power without any buffs.
Reason armor penetration is so high is again cos of combat set, but i doubt id go for less than 45%, so with proper gemming i would probably have 822 haste, aka 25% and arround 5k attack power.
Spec i used for this was the one i linked above.
Il update this comment tonight or tomorow if i find the time but this is basicly whats the result more or less, mainly cos DPS is based on RNG. If u get Ruthlessness to proc a lot and Muti crits u will do 7.5 - 8k dps on a dummy with poisons beeing equal on % with Melee...
But yea, this is it for now. Best of Luck.