Shard progression
Process shards into shard packs
Disenchanting unwanted shards converts them into same-tier dust that can be exchanged for another pack.
Shard inventory for disenchanting, then the War Recruiter for dust exchange.
Repeatable when you have ten dust of a tier and expendable shards. Each exchange uses ten dust for one pack; pack contents are random.
Stop when you have the shards needed for your build or when further random packs are less useful than saving shards for later.
Open a guide to find other locations and see what the item is used for.
Disenchanting unwanted shards converts them into same-tier dust that can be exchanged for another pack.