As a disclaimer, 2 of these builds are min/max builds, and you should always put RP ahead of mechanics if it matters to you. Also, I personally am in general against the use of disablers or other set up moves as an ambusher (from a min/max perspective). There are exceptions to this, where height is an issue, perceptive critters in arena, etc.. But for general hunting, since ambush stance pushdown is already doing half the work of a set up move for you, you shouldn't need to use them if you are min/maxed (or if go with build #3). Instead of utilizing disablers or divert against swarms if they are too much for you to handle, you can use vanish or silent strike (Remember too, that silent strike has no armor penalty like vanish does.).
I'd recommend doubles (or possibly robes if you have amazing DS.) or MBP as your armor with all of these builds, depending on your needs (DS from Light armor proficiency, or +TD from MBP.).
1)TWC Daggers with Whirling Dervish and Predator's Eye.
The key to this build is getting two crit weighted daggers (Preferably HCW, and preferably perfect forged) that are 7x, and having the enhancives/ascension needed to achieve AS to get the end rolls required to make it shine. Your goal should be able to consistently get 239+ end rolls with perfect daggers (247 if not perfect). If you can't guarantee those end rolls even with a roll of 1, then you need to get more AS (I'd for sure recommend +50 Edged from enhancives, and perhaps some +CM, or STR as well. Surge of Strength can help, as well as wspec.).
If you are doing a kill bounty (heirloom, cull, or dangerous critter) or solo Arena, I would use predator's eye (Unless there are generally lots of multiples of your target in the same room.), otherwise I would use Dervish (Mmm, bandits).
DS could potentially be an issue for you with this build, so you will need 3x dodging, and perhaps even some +Dodging/Agi enhancives (And/or learn 430/120 if you are well post cap).
2)Dagger and small shield. You will be more impacted by EBP with this build, but it's still cut in half with ambush. This build obviously prioritizes +DS/TD and shield cman defense (Being able to defend against shield bash better is sure nice!), over the ability to kill things more easily. An ensorcelled shield can mean +15 TD for you (-15 CvA), besides the other obvious boosts. You can also learn Deflect The Elements, which defects any type of flare (including dispel flares).
This is the build I personally have, as I like defense over killing speed (Though I use brawling weapons, which I will touch on later.).
3)UCS Mug build, with a shield and Predator's Eye. This may very well be the best rogue build there is, and requires the least amount of min/max or gear to succeed with. You can do without the shield, but the benefits of having one far outweighs the negatives.
With this build, you lead with a Mug ambush, which will put you at tier 2 positioning, and then finish them off with a punch ambush to the head. Predator's Eye works with Punch, and gives you a 90% chance to hit the head (if they are standing). It's slower to kill, but it's the absolute best build if you want to include Mug in your hunting, because the initial Mug gives you a tier up (and is faster than a regular UCS ambush), so that your follow-up ambush to the head is tier 3. A tier 3 ambush to the head should kill even if they EBP the attack, since UCS works differently in that regard.
The nice thing about UCS, is even though it's slower to kill overall (Because you usually need two attacks to kill), you don't need to invest as much in +attack gear, and crit weighting has very little impact so your gear is not super important.
As for the dagger builds, potentially the 3 second brawling weapons, namely the Blackjack, can be 5% better. But to make it work requires better gear, training and/or spells. Another thing to consider with the non-UCS builds is +Dex, as every 4 bonus = 1 CER crit weighting. Also, +50 stamina regen is also fantastic, and will help you greatly if you lean on vanish or silent strike to kill. Something to consider about vanish, is that it is also a great offensive min/max move, as it shaves off your 1 second hide RT. Probably 99% of my vanishes, personally, are to shave the 1 sec RT and NOT for defensive purposes. Silent strike also removes the 1 sec hiding RT from your TTK.
Also, you may notice that I did not include ranged in these builds. Ranged is great in many ways, and is a strong path, don't get me wrong. But these are the three BEST builds. If anyone wants to claim that ranged is better, come at me bro! I will gladly explain why melee is better (purely mechanically speaking.).
EDIT: I forgot to mention garrote. You can use it against stuff like OSA captains instead of subdue + waylay.