I don’t know what you’re talking about I ran this on three characters two of which were under level 10 to get all the chapters in the book. The hardest one for me was on my level 8 in the crypts because the fire in there and the traps if you timed it wrong was an instant kill. Other than that I had no issues with any of my characters getting all 6 chapters, heck 5 of the chapters don’t even require you to go anywhere close to mobs. Well I take that back, the one in Kessix Hills if you don’t go all the way around the bend and try to run through the bandit camp area will get you or the bats on the cliff side there. But otherwise I think you may have just been oddly unlucky with aggro. I always explore high level zones with low level alts as an avid alt-o-holic and try to complete all content for holiday events as soon as they come out not when my character is “level” appropriate to the zone.