If I were to solo an untwinked rogue, I would make a barbarian. It's a rough start, but once you get to Blackburrow things will pick up. Even green gnolls drop fangs, and there are the quests over there to help with money. Once you get to 10, put all your points into backstab and make sure to start the fight with that. Depending on the mob, if it misses I'd run to zone and try again.
It wouldn't be easy, but it would be doable and challenging. You just have to be smart. Fight single mobs...land the first blow...then you should have enough of a head start to get them to run away.
Far more challenging and down time than a ranger for sure. I think Ivory can make it work.
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