Talk:Octavia/@comment-104.173.87.242-20170424094849/@comment-78.35.194.191-20170424200449

It's right there in the article:

"Neuroptics blueprint can be found from Rotation C of Orokin Derelict Survival."

Rotation C is after 20 minutes.

There's even a link to the Rotation page where it is explained that Rotation C is after 20 minutes, in case you needed to look it up.