I only need (2) of the three headed rares, I play every day since this zone came and have yet to ever see the back 2 spawn :(
How did you get last week? I'm doing every week since 8.2 came and only finished today.
You forgot to include Rastreador de tesoros as one that can be harder by the PC/Internet setup of some players. That one needs pretty much no lag for it to 'count' on some of the harder ones.