Probably been said before... But how about Eris doing a deal? That girl loves a trade...
@Rank 4 exchange [insert number here] ascendant shards into 1 radiant shard(s)
Yes please!
[spoiler]in a couple of months people will have the same problem - far too many shards/energy with no worthwhile reason for keeping/using them >_<[/spoiler]
Happy new year.