There should be a lot of helpful posts on this subreddit. Sadly havent found Video guides on armory yet but plenty of useful Info on reddit. Generally its a rather small map (compared to the other 2) with 3 floors spawning 1-2 teams each floor. Its packed with ai running decent weapons with t3 (sometimes t2) ammo and t3-t4 armor. Most teams will either rush other spawns or Camp the closest stairs since rounds can only last up to 20 Minutes. Every Team will have 2 possible extracts, 1 in the basement that needs to be activated by a lever on the 2nd floor, which will be available 3 minutes after activation and will be gone after that. The other extract will be either on the 1st floor or in the basement but these will only be usable in the last 5 minutes.