Siege of Sirlond mission

[Fredegarh_Wayfarer]

I think this Cardolan mission is broken. Or at least poorly thought out. I just tried this on Tier 3 (which isn't even that high) and had an incredibly frustrating experience. The enemies kept multiplying and the clouds of malice kept appearing to the point where it was nearly impossible. I got frustrated and decided to quit the mission -- only to find that I couldn't because the enemies resumed the attack as soon as I respawned. There wasn't time for my character to leave the instance. I died multiple times until the time limit ran out. The quest goal said to find the scout. But the scout was nowhere to be found, presumably because there were still enemies around. "OK," I thought, "let's kill the enemies and finish the quest." But by this point I'd died so many times, my gear had been destroyed and I had no weapons to fight with. So I couldn't finish the mission, I couldn't quit the mission, and I couldn't even get out of the mission.

I felt like I was part of Balin's Moria expedition. "We cannot get out. The end comes soon. We hear drums, drums in the deep. They are coming."

I finally was able to leave the instance by using my Hunter's camouflage skill to get the enemies to ignore me for a few seconds. I can't imagine how a player without that skill gets out of the mission. Quitting out of the game entirely, I assume. I feel like this mission needs to be nerfed slightly. Even if the difficulty remains the same, maybe update it with a safe respawn point so players don't get literally trapped inside the instance? I like the Before the Shadow update overall but some of these missions are ridiculous.