Five of a Kind

If you make sure to collect all the various vortex pieces you'll come across whilst fighting enemies in the normal course of completing the DLC then this is easy enough to do from about 2/3 of the way through it; all in one go at a Weapons Workshop.

All five kinds are listed in your crafting menu, and following the above you can do them all in pretty much one hit (i.e. wait until you've got lots of materials).