This setup focuses on the Heavy being able to soak alot of damage while dishing damage out at all ranges.
1. Heavy
Weapon: HMG
Grenade: Locus Grenade
Role: Close Combat
2. Heavy
Weapon: Assault Rifle
Grenade: AV Grenade
Role: Mid range/AA
3. Heavy
Weapon: Laser Rifle
Grenade: Flux Grenade
Role: Long range
4. Logistics
Weapon: Swarm Launcher/Forge Gun
Grenade: Any really
Misc Equipment: Repair Tool, Nanite injector, Nanohive, Drop Uplink (these are in order of importance so if you have 3 slots take the first 3)
Role: Healing/Reviving/Resupplying
Squad Tactics.
This squad while slow is great for defending and slowly pushing. The heavy suits while sacrificing speed gives the squad a longer survival time. Each of the Heavies overlap with another for damage distances meaning at least 2 are in a good range at all times. The grenades are spread out as to be able to handle all situations of opponents including vehicles.