[b]Link: https://www.youtube.com/watch?v=kYXOcwv6HEk[/b]
Above is a link to a full walkthrough of every step of the new Exotic Pulse Rifle quest chain and how to obtain the Outbreak Prime Exotic Pulse Rifle.
For a text guide and other findings, please see the following reddit post for a great collection of information:
https://www.reddit.com/r/DestinyTheGame/comments/54uogf/spoiler_datto_just_solved_the_monitor_puzzle/
I am not the original finder of all this information, almost all of the credit goes to /r/raidsecrets for working this all out!
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Need a Titan at the second siva engine