Your goal is to eliminate the boss as fast as Path of exile currency possible while trying to clear the map. While it isn't mandatory to clear the map first before the boss, it will help your map sustain by getting more normal maps from non-boss enemies. Linear maps like Silo or Underground River are perfect since you run through every part of the map to get to the arena or boss.
Some maps, such as Cemetery, Jungle Valley, or Dunes, are also great because they are so open that you can easily clear the whole thing before going to the boss.
Fast-clearing builds that don't require you to stop to attack are favored in this strategy.
You should add more notable atlas passive skills, such as Vivid Memories, Remnants of the Past, and Conquered Conquerors, to get more influenced maps. For your remaining atlas points, you want some mechanics that are great for boss rushing, meaning things you can profit from without needing to Path of exile currency for sale stay on the map for long.