I have not had luck either, supposedly Alerts ad Syndicate missions increase it but doubtful as I have done a handful of both and always receive duplicate tilesets on missions. I have 3 others to grab so I will grind those and see if that "trips" 13-2/13-3 to spawn and let you know.
Kuria 13-2 13-3 (SoTR)
in Players helping Players
Posted
I have not had luck either, supposedly Alerts ad Syndicate missions increase it but doubtful as I have done a handful of both and always receive duplicate tilesets on missions. I have 3 others to grab so I will grind those and see if that "trips" 13-2/13-3 to spawn and let you know.