Your going to hear a lot of varied advice.
I mean, most of all you want to put points into ballistic accuracy (Focus) and ballistic damage (Perception).
What you also will learn and need to understand is the defensive stats. If you pump the 30 points into those 2, your defense bonus for melee and ballistic will be good, but lacking against thrown and viral attacks. It all breaks down to your planned tactics and loadout.
With duelist, I would certainly suggest the points in focus and perception, but also something in reason, get yourself some more points for thrown defense, since those MKT's think they can take on the gunmen easily.
