By picking a Single Boss target at any setting you will get the name of the boss you need to kill in the adventure window. Just attribute the name to the layout to the rare and cycle through the adventures until you get the one you need.
You also need to take in consideration that some bosses share different zones.
Boss that share layout are marked with a *
-The Drudge Hollows: Nsat Egne, Tjumen Mayok Ibu, Tjumuen Ghendi
-The Gladiator Pits: Dokolet of Rujark*, Vokrek of Rujark*, Maotog One Tusk*
-The Barracks of War: Dokolet of Rujark*, Vokrek of Rujark*, Maotog One Tusk*
-The Halls of War: Dokolet of Rujark*, Tehyul Master of Steel, Vdure Bonecrusher, Xendren Marl
-The Blazing Forge: Fendr the Spiritcaller, Noyon Kteggen, Noyon Ztun
-The Hidden Vale: Orut Egne*, Kyten the Slightless, The Rujarkian Jeweler
-The Wind Bridges: Orut Egne*, Orlok Dtuak, Orlok Nebendis
-The Bloodied Quarries: Ubril Vkelrel, Sikl the Manslayern, Warmaster Skooru*
-The Arena of Chance: Pyol Skinsear*, Elokoh the Trainer, Warmaster Skooru*
-The Fortified Lair of the Taskmasters: Pyol Skinsear*, Urett Marl, Fhenit Fleshflayer
With the important caveat that, when requesting a dungeon, any of the last 5 dungeons that you have started will not be included in the possible dungeons you request next.
