What's the best way to store up glimmer?

[vernal river]

Between Herealways Pieces, Phantasmal fragments, and Dark Fragments or whatever these things are called, what's the one that gets the fastest equivalent of glimmer at Rahool?

[somber patrol]

Phantasmal Fragment and Herealways Pieces. since you can get a lot of them doing stuff on respectful planet.

Phantasmal you can buy for shards that are going away after next season