Another really great thing about choosing the Survivor class as a base for your character is the 'Super speed bug'.
To use it, get hold of a frog statuette (You'll be able to buy one later in the game) then use the survivor's 'special' move and crouch.
While you're crouched, open your inventory and click on the frog statuette to polymorph into a frog (sorry, I can't remember if it's a left or right click, you'll have to experiment).
Run around like a mad thing until all your stamina runs out, then click on the frog statuette again to polymorph back into human form. Then right click on yourself to stand up again. You should now be moving at super speed!
Simply because of this marvelous exploit, I use the survivor class as the base for all my character builds, whether they be a mage, warrior or thief. Otherwise the tediously slow running speed really drives me up the wall.