This may not be related to the zone, but I am struggling with the Flesh Eater (doing the sig quest line). Yesterday I was able to take him down fine but struggled on Rallius (insta killed probably due to me not having figured out the strategy yet). Today the zone has been reset and all the bosses are back. I noticed that during some fights Zhugrus (my merc) will suddenly just stop healing me - healing great up until that point. This also happens on the Flesh Eater. I have tried several times today and when the Eater reaches between 10-35% health (varies) Zhugrus stops healing me. It is not that I am getting overwhelmed by the putrid piles that starts spawning and Zhugrus can't keep up with healing - he just goes from healing fine to no heals at all.