This will be a good weekend for Horde, and the Boomer attacks should be much better than those random Sire waves.

Epic Games announces a frighteningly awesome event this Halloween—another double XP event weekend! Friday, October 30, through Monday, November 2, you and your friends will receive double experience points in competitive multiplayer and Horde as well as a team winning bonus. And in true Halloween fashion, waves of Horde will get scarier: Boomers will attack on any wave, and a full Boomer squad could appear and attack at any time! This means that waves 10, 20, 30, 40, and 50 will be nothing but Boomers—get ready for some wicked fun!

x3 xp is going on right now... it ends on the 16th. lvl up as much as you can!!!