Drake and Stalkers are good with a BH in duo...I wouldn't recommend going solo there.
Dragon Valley, The Cemetary, Forest of Mirrors are my suggestions for soloing (or duo-trio)
I concure with the above. I've a Sorceress myself and DV, cemetary or FoM have been very good solo'ing spots for her. Even with the minimal buffs she can give herself it has never ben a problem to two shot or one shot the mobs there with a blessed sps. Use your sleep if needed or when having multiple mobs getting at you.
Although bloody queens were red back then I managed to pin them down easily enough and they give good XP/SP.
For the rest it really depends on what mobs you like to kill most. I like the FoM region best for it's scenary as well as for it's mobs, but I did have my share of fun in DV as well.