There is one thing you should know, though, about Master Dagger:The triple damage is far weaker than advertised. It seems to triple only the actual Dagger's damage (not the combined damage you see on the char screen).
It's buggy. It doesn't work as often as it should, and conversely, believe it or not, I sometimes got critical strikes when only having Expert Dagger.
Still, dual dagger is the way to go for raw damage output, for Druid and Sorcerer. I just sometimes to prefer Staff for Sorcerer because their hit points are so weak and I like the AC boost.
