All 3 of the "relive xxxx" in the Lost Vale should be "very easy" for me, according to my quest journal. I've not completed them before, so it's not like I've unlocked the more difficult tier opportunity. The *only* one that was remotely doable without dying numerous times was the grand artificer one, which I was able to complete without dying. The one with the circle throne room? Died something like 10 times before managing to complete it, and only because the scene doesn't reset between deaths. So I could slowly pick off a few mobs, die, run in, rinse and repeat until finally defeating it. "Relive the Seige of Opalis"? Not even possible in the slightest. If I'm lucky, I can get part way through the second wave of elves. Since it always resets, there's no way for me to complete this. The journal is massively inaccurate in its difficulty estimation for these 3 quests.