Remnant 2 - Succession Achievement, Monarch, & Crimson Guard Armor
21It appears for this you must roll a "The Awakened King" Adventure mode, it can not be your first roll as the first roll for the Awakened King DLC populates ONLY the new map locations.
On your second & every other Awakened King roll, the new locations will be mixed in with the old Losomn locations, this is key as you will need the "Gilded Chambers" map.
You need to Kill the king, then go to the "Gilded Chambers" farm out 3 "Crimson King Coins" (this may take several time resetting the dungeon by touching the crystal at the start) PAYING the prince a 3 coin tribute, then going back to the "Chamber of the Faithless" where you killed the king to talk to the prince...
In the video I also took the chance to grab a couple of other things by making sure I was wearing the "Crown of the Red Prince", the "Assassins Dagger" and the "One True King Sigil" and NOT WEARING "The Burden of the Divine" (My first attempt I was wearing the ring with the other items & he didn't pay up)