Things you can do with Myth before they go away, in the order that I will be doing them:
  • Grab the three myth minions if you haven't already ([0-3]*30).
  • Finish any Atma Books you have left to do, if any ([0-9]*1,500).
  • Buy 3X vials of Superior Enchanted Ink, where X = the number of relics you plan to get through the Atma grind (only one for me, I think) ([0-10]*1,500).
  • Buy X bottles of Quenching Oil, where X = number of retainers plus one, storing one on each retainer, up to the number of relics you don't have yet (including the one for Ninja) ([0-10]*225).
  • Buy 3X bottles of Thavnarian Mist, where X = the number of relics you don't have yet (including the one for Ninja) ([0-10]*900).
  • Buy one piece of each Myth gear that you like the look of, or just one piece of everything you don't have yet since the Equipment Guide is coming at some point (varies).
  • Convert all remaining Myth into either GC Seals by buying Myth accessories and turning them in (1k GC Seals per 375 Myth).

At least, that's what I'll be doing with mine! Anything I missed that's worth doing?