DCUO: Don't Fight the Power

Batman in JLA Watchtower

NOTE: This is an old post, but the feat still exists and the way to get it remains the same, although the current state of the game makes this easier than it's original date.

Original Date: October 15, 2015
Location: Justice Girls league site

This a feat for both the regular Watchtower alert and the LPVE version. The regular version of this is a non-issue. This guide concentrates on the LPvE version where you're not using your powered up character.

You have 4 rounds to defeat Eradicator before he enrages. So you must burn roughly 25% per round. Note that Round #2 is shorter than the other three. So don't get too much into a rhythm or you might kill a drone by mistake. Look for the drones to release much earlier. All 4 players should use the legend they output the most damage with. Don't worry about teamups and checklists for this run. I recommend going with a legend that has a 35% finisher like Wonder Woman's Coup de Grace. This should be spammed whenever it's off cooldown during the last round. 

Justice Girls in the Watchtower

You can grab 2 health barrels from the adjacent room (for a total of 3) and they won't despawn. Use them for the 3 rounds of your choice and then just keep attacking. Try to stay within combat distance at all times or Eradicator might reset. Don't stand near the alcoves because if he lunges into it, he might also reset. During the drone rounds, just keep evading. Use shields if you just got hit and are experiencing combat slowdown. Stealth keeps you undetected if you have it. If you're flight, you can supersonic in a circular pattern (see video).

We actually got the feat not following many of those rules. So it's really possible with any combination, but the above tips increase the odds significantly.