I rushed 250x Abomination Maps to hunt Reality Fragments for Uber Maven. This farm has 3 boss-specific drops I am looking for: Reality Fragments, Unholy Trinity Supports, and Malachai's Mark gloves.

The boss is usually located in the top corners of the map. I found that if you take a right (as if you were looking from the portal) when entering the map, the boss is found in the corner it leads to. Just go out and up.

The map boss can still drop 3 fragments. I did not see any benefit in rolling the maps for high quantity to try and hit the 235%+ threshold for a chance at a 4th fragment. You diminish the profits of the farm. Since we are not rolling maps, I chose to eliminate all explicit modifiers using scarabs. This made the maps very easy and fast.

PoB: https://pobb.in/SQUsLH3F7hoh

Atlas: No atlas because it isn't really a factor. I chose lost shipments/svallin.