I believe that Sap Master has a high potential. And the rogue debuffer role is really better in Unchained mode. But after searching a lot, I've came with two possible pathways:
A) Rake / Scout / Sap Master / Short Bow Merciless Blunt arrows user / Shatter Defenses
Rake and Scout archetypes can make a viable archer rogue. With Sap Master and the use of Merciless Blunt Arrows, you can nearly do high damage while in distance of 30ft. At level 8th we can Skirmish to start rake's Bravado Blades to get a not free but certain intimidate. We would get +5 circunstance bonus for each SA 1D6 you give up. This would have some synergy with Rogue Edge (Intimidate), giving the opportunity to insta frighten, panick or cower a enemy. And after the first SA with skirmisher, Shatter Defenses gets online. And you can just sit down anywhere and Rapid Shot that enemy while you never got close. If someone gets too close, start moving and use debilitation to hamper its movement, even if it would get you an AoO. But here, we can't count with the Sickened condition from Thug. It gets good in level 8th but, before that, we can still charge for SA with the sap and still use Blades Bravado and etc. This opens a good ton of combos with other Archer Feats.
B) Thug / Scout / Sap Master / Enforcer / Sap user / Shatter Defenses.
I have to stick in melee and use Enforcer in order to trigger intimidate. And I'll be getting the Brutal Beating effects, that means sickened, and a whole life shaken with a flexible frightening option. On top of that we have debilitation injury. With Offensive Defense you can actually have good survival chances in melee. At level 4th you can actually charge for 4d6 SA, and be able to inflict -6 penalty on attack rolls and still get 4+ on AC. Of course, it gets harder when we have more enemies around. At lvl 8th then, we can Skirmish with the bow. We can move up to 30ft then make a sap mastering attack with a bow. But, it will not be using any of the Enforcer feat. In other hand, it would be a good retreating way: hampering in debilitation injury while moving and hittin' tons with the bow with 0 archer feat costs.
OBS: I would be using both weapons in any of those paths. So, both ways of fighting. Both weapons would benefit from Dex because of finesse weapon. And forget Undeads, Constructs and others.
Which one of those would be the best? A or B? Rake ranged or Melee Thug?