The only way to obtain illusion stones at the moment is daily quests turn in (135 daily/per character), and 0.2% chance to drop a special item inside illusion dungeons.
I suggest either giving another higher drop chance for illusion stones (1% maybe), or allow us to recycle illusion gears into illusion stones (which would also help when you drop too many illusion accessories, since they can't be refined and turned into refine tickets).
