I am a player who can play only about 2-3 hours a day after work and I did not get the chance to do the legendary shard dope and I am always at less then 100 shards and when I do get enough to get a engram focused I'm back to nothing and it takes all my time to get just enough shards to focus another engram it's reticular that doesn't even included upgrade manuals and crafting guns there needs to be a better way to grind for them
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One thing that helps is to keep a ghost that rewards extra legendary drops from playlist activities. They will most likely be crap.... I mean 4 shards.