This has to be the worst system in the game that I have seen thus far. So far it seems that you need Unrest for the wicked, Help Wanted, and Pyromancer Supreme to be completed. You also need to kill scorpions and hope that a cluster farm group doesn't screw your chances of spawning FAF.
IF you get FAF to spawn and complete the fate chain, you have almost no chance that the note will drop. I can't even count how many times I have completed the fates.
At what point is this supposed to be fun? SE, you really need to fix this crap!