I agree with EG here. ^^green group mobs are a fast track to great solo XP.
I was doing the bear in Oakmyst from about your level until they went gray to me at which point I moved over to the scarecrows in Antonica. These are now going gray so I am in the process of transitioning to the Antonican Stag and the gnolls in Archer's Wood.
All of these are group mobs who travel alone, (meaning that you can reliably pull singles), and can be taken down solo a good percentage of the time.
Every now and then I do take a death but it's still heaps of fun!
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"Well, my days of not taking you seriously are certainly coming to a middle."
~ Mal Reynolds