Nightmare Street Egg Drops

Anyone else having a REALLY difficult time getting egg drops from Nightmare Street?? I've done each level about 30 times each with my Egg Drop Team and only gotten two basic drops for all the sync awakenings. I have yet to get Melissa or Grida, either.

Anyone have any tips for me? Maybe a really good leader or team combo? I feel like I'm beating a dead horse with how many times I've done this dungeon, let alone how many magic stones I've used refreshing my stamina lmao