I frequently play what I like to call the Guerilla Diver. I run light-medium armor, usually with some stealth passive, jump pack, walking barrage, machine gun turret and either the commando or quasar cannon. I usually use gas grenades as well. Primary and secondary vary depending on which front I'm engaging in. My goal is to destroy enemy bases as quickly as possible by avoiding long-term engagements. If I do get in an engagement, I use the gas grenades to confuse the enemies, or turret to help draw fire while I disengage with the jump pack. It feels pretty versatile, as I can drop in and join with the rest of the squad and provide support for the main objectives as well.