Uniques with symbol E:u: Quaker, Master of Earth
  conflicts with monsters: Earth spirit, Earth elemental

Uniques with symbol H:v: Baphomet the Minotaur Lord
  conflicts with monsters: Jabberwock

Uniques with symbol W:D: Uvatha the Horseman, Adunaphel the Quiet, Akhorahil the Blind, Ren the Unclean, Ji Indur Dawndeath, Dwar, Dog Lord of Waw, Hoarmurath of Dir, Khamul, the Black Easterling, The Witch-King of Angmar
  conflicts with monsters: Black wraith, Nightwing, Nightcrawler, Nightwalker

Uniques with symbol E:b: Waldern, King of Water
  conflicts with monsters: Water spirit, Water elemental

Uniques with symbol p:B conflict with each other: Wormtongue, Agent of Saruman, Harowen the Black Hand

Uniques with symbol o:y conflict with each other: Lagduf, the Snaga, Grishnakh, the Hill Orc, Golfimbul, the Hill Orc Chief

Uniques with symbol p:R: Castamir the Usurper
  conflicts with monsters: Illusionist, Necromancer, Demonologist, Enchantress, Sorcerer

Uniques with symbol Q:v: Qlzqqlzuup, the Emperor Quylthulg
  conflicts with monsters: Nexus quylthulg

Uniques with symbol h:B conflict with each other: Smeagol, Fundin Bluecloak

Uniques with symbol U:v: The Balrog of Moria, Lungorthin, the Balrog of White Fire, Gothmog, the High Captain of Balrogs
  conflicts with monsters: Lesser Balrog, Greater Balrog

Uniques with symbol E:r: Vargo, Tyrant of Fire
  conflicts with monsters: Fire spirit, Fire elemental

Uniques with symbol T:s conflict with each other: Bert the Stone Troll, Bill the Stone Troll, Tom the Stone Troll

Uniques with symbol e:v: Omarax, the Eye Tyrant
  conflicts with monsters: Disenchanter eye

Uniques with symbol p:s: Gorlim, Betrayer of Barahir
  conflicts with monsters: Black knight

Uniques with symbol q:D: Beorn, the Shape-Changer
  conflicts with monsters: Werebear

Uniques with symbol o:b conflict with each other: Lugdush, the Uruk, Ugluk, the Uruk

Uniques with symbol p:U conflict with each other: Brodda, the Easterling, Ulfast, Son of Ulfang, Sangahyando of Umbar, Angamaite of Umbar, Ulwarth, Son of Ulfang, Uldor the Accursed, Ulfang the Black

Uniques with symbol E:B: Ariel, Queen of Air
  conflicts with monsters: Air spirit, Air elemental

Uniques with symbol h:D: Eol, the Dark Elf, Maeglin, the Traitor of Gondolin
  conflicts with monsters: Dark elf

Uniques with symbol p:v conflict with each other: Lorgan, Chief of the Easterlings, Saruman of Many Colours, The Mouth of Sauron, Sauron, the Sorcerer

Uniques with symbol h:o conflict with each other: Ibun, Son of Mim, Khim, Son of Mim, Mim, Betrayer of Turin

Uniques with symbol D:R: Smaug the Golden, Itangast the Fire Drake, Glaurung, Father of the Dragons
  conflicts with monsters: Dracolisk

Uniques with symbol C:r: Carcharoth, the Jaws of Thirst
  conflicts with monsters: Hellhound, Hellhound

Uniques with symbol S:D: Shelob, Spider of Darkness, Ungoliant, the Unlight
  conflicts with monsters: Cave spider

Uniques with symbol C:u: Draugluin, Sire of All Werewolves
  conflicts with monsters: Wolf

Uniques with symbol C:U: Grip, Farmer Maggot's dog, Fang, Farmer Maggot's dog
  conflicts with monsters: Scruffy little dog, Jackal

Uniques with symbol p:y: Ar-Pharazon the Golden
  conflicts with monsters: Ninja, Dagashi

Uniques with symbol o:v conflict with each other: Bolg, Son of Azog, Azog, King of the Uruk-Hai

Uniques with symbol o:g conflict with each other: Ufthak of Cirith Ungol, Shagrat, the Orc Captain, Gorbag, the Orc Captain