Best Boss Order For Elden Ring DLC?

  • Divine Beast Dancing Lion
  • Rellana, Twin Moon Knight
  • Putrescent Knight
  • Bayle the Dread
  • Golden Hippopotamus
  • Metyr, Mother of Fingers
  • Romina, Saint of the Bud
  • Commander Gaius
  • Scadutree Avatar
  • Messmer the Impaler
  • Midra, Lord Of Frenzied Flame
  • The Final Boss
 
IF speaking strictly of the major bosses I'd say

  • Divine Beast Dancing Lion
  • Rellana, Twin Moon Knight
  • Romina, Saint of the Bud
  • Messmer the Impaler
  • The Final Boss
Golden Hippotamus may or may not be mandatory depending in how you enter shadow keep

also i strongly recommend Count Ymir questline that will lead to Manus Mateyr Bossfight and Bayle + Midra