Expect to use weapons in combination, as well. Striking an opponent with photon burst splash damage can knock the enemy's health down to near zero. Instead of attempting to successfully score another hit with the photon burst, consider switching to a rapid-fire weapon, such as the scavenger weapon or tetryon pulse disruptor. If the opponent's health is near death, it won't take many successful blows from these machinegun-like weapons to score the kill. Look for opportunities to exploit a roomful of players or two or more players engaged in a firefight.
Explosive weapons are the key here.
Pull out the photon burst or compound grenade launcher and fire as many rounds as possible into the group. The arc welder, arguably the most powerful weapon in holomatch play, should also prove effective against an enemy group. The arc welder's devastating beam can rip through enemies in a matter of seconds. It may take longer to finish off a group, but if you can dodge any counterattacks, you should have little trouble scoring two or more consecutive kills. Strafe in a circle around the opponent while, at all times, keeping your crosshairs aligned and your finger down on the trigger.