I will try to upload more pictures and magpybe a video walkthrough. But do note that this was built on the mgdium island not the big one and when you actually play the map, you'll find that it's best played as a 2v2.
https://www.halowaypoint.com/en-us/players/revrsepalndrome/halo4/fileshare#!/?section=GameMap&SearchDate=7&SortBy=2&view-select=Tile&startIndex=0&details=479c8ea6-6507-4119-8ee7-d7813d9c13d5
Under Map Varients. Small competitive map for 2-4 players. Supports Koth and Slayer Variants.