This map can be found in my Halo 5 fileshare as "RTSN: Praesidium" (GT: Rogue Artisan).
YouTube Teaser:
Praesidium (pronounced Pry-sid-e-um) is an intense breakout map designed with the Pro in mind...
Praesidium tests your skill at all ranges with long, vision-obscured corridors, tight corners, and open yards.
Professional jumps have been added throughout the map to promote skill-based tactics and provide faster methods for traversing the space.
Praesidium is gorgeous as well. Subtle effects and scripts have been added, making for a dynamic playing experience that makes the map stand out without becoming a distraction.