Rebuilding a rogue

[Dusk Eclipse]

I was checking my Myth-weavers account and stumbled upon an old character of mine which I made before I got into optimization. The character in question was a Longtooth Shifter Rogue 8/Swordsage 2 who wielded a Spiked Chain and was combat focused, with a side-dish of poisoner (humanoid heavy campaign so Poison did work even at this levels, I had friendly psion that mantained my Black Lotus Poison stock high) and general skill-monkleyness.

If we try to keep the general theme how would you rebuild it? More swordsage? Ditching most of the rogue levels?

[BowStreetRunner]

I would usually go Rogue 10 before dipping Swordsage in order to pick up my first Special Ability from Rogue. There is not much reason to go more than 2 levels of Swordsage either. If you are a shifter, you might want to go Bloodclaw Master for any additional Martial Adept levels you need. Or you could look at Master of Nine or Shadow Sun Ninja.

[Dusk Eclipse]

What Special Ability would you suggest then?