It is possible to boost this along with every other MP achievement on Doom.
requirements: minimum of 4 players
once you are in the multiplayer menu, push
and select Asia-Pacific. As of writing this the Asia-Pacific servers are D-E-A-D as a doornail. nobody is playing on any mode.
once everyone is ready, select FIND A MATCH and select either Team Play or Team Deathmatch. Team Play has a few modes that spawn no demon runes (I believe freeze tag and infernal run do not, message me if I am wrong or missing modes). Team Deathmatch always has demon runes appear.
I suggest using Team Play to boost demon kills for the simple reason the modes it offers will give you cues on where to meet up. Domination and Exodus have icons on your HUD everyone can meet up at.
The game should match 4 boosters within 30 seconds everyone is searching.
demon runes take 1:30-2:00 to spawn and only last for about a minute. to get the most out of each rune, have the team that gets killed meet up by the rune before it is collected then move onto your meet up spot (again, its easier to do this on Team Play modes)
if you're well organized, you can get up to 8 demon kills with 1 rune
the fastest way to get kills with the cacodemon is to hold down
. A circle will begin to appear, and once it is completely full,, aim at an opponent and push
for an instant kill.