I have had horrible results with the Shaman fight classes personally. If I use a good ele shaman Gnome Sequencer macro and run him manually he does ok. NOT like a DK of course, or any tank really. But comparing botting anything to the survivability of a blood dk is going to end in heartache. Blood DK's are super strong solo classes....
Honestly; running all my toons other than tanks feel squishy, but it might be more fight class then anything....imho.