After a year i have had a few classes from the feline run and gun energy transfer to the FY aim enhance. But can Honestly say this class works best for my playstyle (hope others can trial it and feel how great it it). Plus with this you can become a walking tank whenever you want 50 CAL BABY!!

DXG-1 - Silencer - Extended mags
Scar - Reflex scope - Granade Launcher / Extended mag (depending on rules/game type map)
Frag Granade/Smoke (same as above)

Proximity alarm 3
Visour Enhance 3
Loadout pro 3