I describe this vehicle as armored car that performs much like Hellbender, but the idea would also work as hovercraft and tank. The crew would be 2: driver and gunner. The driver would just drive. Maybe he could have some sort of special ability to trigger that relates to vehicle's movement like a speed boost or manta's jump, but definitely not shooting weapons. Gunner would have some sort of energy weapon, maybe the lasers that sentinel turrets fire on assault maps fire or shock turret beam with little slower rate of fire.
Health would be 500 (less for hovercraft version, more for tank), but the crew would be completely protected by armor like in Goliath and the vehicle would be additionally protected by a shield of about 100 points. This shield would protect the vehicle from all damage except collisions and would regenerate really fast: from 0 to full health in 2-3 seconds, but here's the catch: it doesn't recharge if the gunner is firing his weapon (or driver is using his special ability if he has one).