This is a map I plan to include in my Eternity Engine map pack, Somber Density, but decide to release as a single map for people to test. One big map with lots of enemies, but most of them are low health ones. Is very difficult on UV however, so maybe you will try HMP first. Runs with the last official version of the Eternity Engine (https://www.doomworld.com/forum/topic/119425-eternity-engine-40200-forseti/) or you can download developer builds from https://devbuilds.drdteam.org/eternity/