I would advise everyone who has a chance to go for the challenge on Tuesdays, preferably at reset. I've noticed that it's way, WAY, easier to find decent groups this day, probably because all the hardcores are stying up to beat it. A few days later and you'll end up in groups where people (seemingly) havent beaten things the normal way yet. Hell, I ended up in plenty of groups today where people didnt even know where the knights spawn.