There are some option of keymapping, which I don’t realy get. Perhaps, because they just don’t work:
“different shorcuts for different weapon-set”-option:
doesn’t seem to work. (I can’t have that, tried several times.)
“v”-key for change of map-display
doesn’t work as well. If you press “v” (that’s the preset-key) just nothing happens.
I managed to set two shortcuts for the same action, somehow: one for the left action, one for the right. The action is the basic-attack at my Assassin. (online-version.) But I can’t do that for my sorceress. So How did I manage this? Or is this a bug? if so, I would appreciate to change this to a FEATURE… 
You need to set your personal key for EVERY character. You can SAVE a personal Keymap, but how do you LOAD it? (so you can set a saved one for other characters with a few clicks, and don’t need to remap it for every damn char out there…)