The cursed chest is a large tileset event, what we did, and there were three of us, was separately look for the large tileset events in the zones in separate games, you find the wrong one, new game. DO NOT LOOK just for the BOUNTY, it'll take forever.
Found the event in under 30 minutes, and I carried the other two for the body count (DH sentries), easy peasy. Hate to say it, but I had't considered doing it in HC for another conquest, and I have a HC in season. Too obvious I guess.