I can't find a boss schedule for Escalation Protocols. I can't find anything about the bosses on Bungie.net too, not even the bosses names. I can't find any article saying anything about the loot drops. All I know is that three drop only one weapon and the other two drop all of them. I know Nur-Abath-Crest dropped the Shotgun, last week. Really want to know what I am gonna try farming for this week and the other weeks.
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https://www.reddit.com/r/DestinyTheGame/comments/8q8p9g/escalation_protocol_loot_table/