Why not to remouve "Ranger Sight" in favour of Dual Wielding?
As warriors have "Elven Sight (which is twice more effective), a sniping thief may just take the warrior's trait, leaving a slot opened for DW.
Of course I might be wrong, and "Elven Sight" is not the same thing as "Ranger Sight" (I am looking in the manual and I won't start the game only because of that: I'll be hooked for another 2 hours and it's midnight here <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />).
