i suggest that you either remove the precursors, or make them buyable for a steep cost for karma, leaving such a large part of the endgame up to chance is ( of course in my opinion) poor game design, if for whatever reason you guys at Anet find that your unable to do this i suggest that you at least tone down how hard it is to even freaking acquire it in some way : / seriously should not force players to spend possibly months trying to acquire even the first step!