Map Bosses - Make em visible on the map like rares

I love having Rares on the map, now what I'm running into is on maps with bosses I'm doing the same old...OK I guess I need to run around the entire map to find this damn guy but I've already done all the content and killed all the rares...I guess I'm not getting the next 5 minutes of my life back while I slowly trudge around this empty map.

Maybe even just make the boss pop up on the minimap after the last rare is killed?

Augry is the stand out however, boss is always in the middle so easy enough to go hit the 3 switches around the edge and then go get him. Some other maps might have something similar but nothing comes to mind.

I'm pretty sure this already exists. Rares are the yellow skull icons and boss is the slightly orange skull. The boss icon may not be visible immediately when you enter the map, but it's a real thing. It may require you to progress the map a little, not sure.

Just did a map with a boss in it, and the orange skull appeared in the minimap (first) and the proper map after advancing and killing some enemies.

Also, when you kill the last rare (and boss is still alive) an orange checkpoint thingy appears near you, which jumps you right next to the boss arena.

Adding rares on the map immediately on entering was a nod to backtracking, the bosses hovewer are final goal of the map if they exist and it would feel easy cheap to have it marked right away.