I would like to get this achievement done through normal play instead of doing a dedicated farm, but you made the requirements to obscure for most blueberries. Please make them show earlier or in some other guaranteed way, otherwise I'm just forced to report people for sabotaging the round.
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No. "Sabotage" them by throwing the engrams far away. If your teammates are too competent (or dare I say too incompetent) and hop on a sparrow to retrieve them, then quit and requeue until you get people who won't go too fast.