I managed to get this in a hornet on the Legendary Brawl playlist by splattering people in a snipers plus lasers match.
My advice however is to use a ghost on Avalanche when your team has the enemies spawn trapped, denying them the laser or rockets, then you just need to flank them and splatter people.
This can also be done in a warthog on sandbox is the best, the turret destroys people plus if it is Capture the Flag then the other team is distracted, gunner=30 kills, driver=10 splatters. Plus there are only 2 rockets on the map plus 1 missle pod per base. If they are disorganized then you will win.