Board Thread:Questions and Answers/@comment-100.10.74.181-20170908024858/@comment-26447088-20170908223558

Yeah, for UvU she's good because of the guaranteed debuff blocks, especially against Femme Fatale. More reliable, anyways.

In longer quests like BotB or Fortress Frenzy, though, Melusine is probably a better choice because Merlin's debuff shields probably won't last too long