User blog comment:MyOpsAreBlackerThenYours/What classes do you want in the next battlefield?/@comment-1582746-20120427012236

Not sure about how effective this one is, but it is just a modification of the Engineer.

Engineer:

Weapons: Carbines

Side arms: Side arm :)

Slot 1: Launchers, Deployables (HMGs, Stationary AT, etc.)

Slot 2: Repair, EOD, Mines, Sandbags or some kind of deployable cover.

I persknally think the Deployables seems like a good idea when on the defense and the sandbags and such could be a great compliment to deployables.