It entirely depends on which AV you're facing and your build, I'd have to say.
It was challenging, but my Night Widow did, actually, manage to take down BAB solo. I felt bad, considering all of the work he's putting in on Power Customization, but, really, his hair clashed with my clothing, so I had to lay him out on the floor.
But seriously, between my initial Stealth Build-Up'd crit off Slash, followed by Placating on cooldown, and a LOAD of Poison Darting, I did it. It was close. But I did it.
Then again, I didn't /actually/ Elude right away. I got a few hits in first. Mind Link is a beautiful thing... I only Eluded for the Endurance.
So. It is possible. A challenge, but possible. Most EBs, otoh, are walks in the park.