0 sounds about right.  You cannot go wrong if you decide 0,1, or 2.  I did not look at your entire roster but if he is clearly your primary scorer then I would choose 0.  Maybe even -1!  He is a high volume shooter (almost 16 fg attempts per game) and he can improve your team's overall offensive efficiency if you change his shot selection.  This is really helpful against quality opponents that can double Vegas and still have everyone else on  your team accounted for.  Now, Vegas fg attempts would decrease and he needs to have better selection and overall efficiency against better opponents.   

In my past experience my team was mediocre when my primary offensive players (only 2) where I only shot from the perimeter.  You should really utilize a big with a high lp presence.  This will improve Vegas overall efficiency.