Would want to suggest Right mouse clicking to be appointed to 1 spell only, it changes to much if you heal and run attack so you can do fatal errors.
i for once would like to appoint it to tornado so i have 1 button to heal with and i can use mouse for movement and attacks.
I F.ex have 7 buttons on my mouse, id very much like to use these aswell as clicking on the keyboard, whats great is that you can use these buttons for easier combos etc.