PDW or MSMC with Laser
B32R (or w/e) always
Ghost (and Flack Jacket for objective game modes)
Toughness (I never use scavenger, a lot of people use MSMC and PDW, and picking up weapons works fine.
Dexterity (Tactical Mask for objective game modes)
C4 is great as Lethal, but i prefer Frag
Concussion as Tactical if there's points for it