For pvp I use CLOAK
FRC Heavy scattergun w/ fire nano (185x12) dmg, 13 in the clip.
Courier w/ fire nano, +15% run speed bonus for 5 seconds after full reload.
Frag nade and high capacity shield w/ fire resist.
Skills are all based around staying cloaked as much as possible with big damage bonuses while cloaked.
I can't log in to name each skill yet.
My K/D is probably 3 to 1 or higher in death match.

For pve
Cloak and w/e weapons I feel like leveling up.