"The most efficient way to boost Seriously... involves everyone getting 30 kills in about 20 minutes and goes like this:

3 vs. 3, 18 Rounds, 1 minute, Warzone on War Machine.

At the start, everyone on the team rushes to Torque Bow. The person who is killing goes to the right of the vending machine-like object in front of the Torque pillar. Those dying go to the left. For the first 3 rounds, both killers should kill their 2 people and then COG kills Locust. The three after that, Locust kills COG.

This cycle repeats once more and both killers will have 30. You do this for 4 people. 2 killers on each team. The last rotation is the trickiest, however. It begins as normal, but when the score gets to 17-15, instead of one team finishing off the other, the round ends in a draw. From there, the cycle continues until 17-17. In this round, both killers kill their two victims and then Locust tags the COG and both players end with 30 kills. Easy enough, yeah?

I advise you to set up a player match and invite all parties involved to make sure everyone is clear on the settings and what to search for when finding the game. Good luck!" -From old Seriously... Boosting Group.

Unless you are going for the weapons you have to talk it over with your teammates, but other than that, follow these guidelines.