I knew that back in 1.5 . What is my specc right now? Well if you must know I am in between speccs, mixing it up and enjoying diffrent flavors from pure xx/general to the most extreme hybrids. The best thing is that I am not noticing any huge performance increase or drops regardless of my specc: almost all feats are great hence it is very hard to accually gimp yourself (something that was super easy in 1.5).
Just because I don't want to be a cheap ass and leave you hanging - here are the most basic speccs and some with a twists:
Comment: still going strong with the offhand. The philosophy behind this build is that Lotus's miasma deals great DOT and its damage is suplemented via SS/GC buffed with extra offhand. The Agile mind is shaved off in order to get best anti caster performance. You can take point off second wind and put it into natural protection.
Comment: this is slightly cheating because we still drop 5 into Lotus tree, but it is best bang for the buck. Agile Mind is a great suplement to the AOD which doesn't offer protection against stun/fears. If you run into a caster then you better hope you can keep him stunned or you will burn. Explosion is your bread and butter and it does wonders.
Hybrid - face stab
Comment: I have had a lot of fun with this specc. It focuses on Face Stab as primary damage dealer suplemented with great anti cc.
Hybrid - Overdose
Comment: this build focuses on Face Stab buffed with Overdose. With two buffs (overdose, kidney shots) you will be having great burst damage.
...and many many more. Let's just say that "assassin dust" is still setteling and there is still a lot to check out and to test. I will be doing atleast several guides on 1.6 assassin, but first let me enjoy the 1.6 reality with whatever limited gametime I have :D
Until then keep experimating - there is always potential gold to be mined from presumably "stupid" speccs