It is not my idea but someone thought that we can donate materials to her to rank up similar to factions.
https://www.bungie.net/en/Forum/Post/214071798/0/0/1
Thank you for all of your thoughts and ideas.
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#feedback
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You can donate Etheric Light. You can get 2 per character by running 32 and 34 PoE. Variks also gives weekly pakages once your past rank 3 that can also provide etheric light. Just have to grind it out.