I'm gonna go ahead and say "Nay"
This info is already posted, and the only thing you have added is the need for both factional players.
One could argue that it's already posted
http://www.taultunleashed.com/phpbb2/viewtopic.php?t=34715
but it does not 'specifically' say to use a factional character, but it should stand to reason that killing everything in a 250m radius includes factional NPC's. Having both factions will only help you eliminate them all when the opposite begins to spawn.
Spawn rates are sporatic, and there is no gaurantee that this will yield you a Jet Pack. I tried for 2 weeks straight, jumping on after server reset, getting yelled at by the wife from playing 16 hours straight for days on end. Guess what- I still didn't get a Jet Pack Base.
If you want a "Yay", post a gauranteed way to yield a Jet Pack Base within a reasonable amount of time.