FC, you need to tweak this part of the ICC DB Quest a LOT. I ran this quest on one of my toons when it first came out. When the mobs were way OP and people were getting owned left and right. Back then the Informant was working right. Now I've done the Informant quite a few more times to help people and do it for an alt of mine and I've run across a problem each time. Either Ground Chief Aune has a Damage blocker/Reflect Shield/Absorb Shield that lasts for around 20-30 minutes, or it spawns 2+ of the Omega Turrets. When petitions have been sent to the ARK's regarding the issue they only fix the quest issue for the person who sent petition and not the whole team. Sometimes the quest mobs aren't bugged and it works properly. Then when those in the team send in petition about it they are sitting there for 2 hours or more waiting for the fix (which only happens to 1 person so it's another 2 hours per person after the first.)
So my suggestion is this, either fix the quest issue to where the mobs function properly, or automatically jump the quest to completion when done with the 4th Segment of 'Hacking the Towers.'