Guys help, I can't defeat slimey, is there something I am missing?
It's kidna late, but whatever. From my own experience, this is the one and only REALLY HARD fight in a game. In my opinion the best strategy is:
Atreyan - revive then dispel shadow then, if no MP item support then slash, if no TP then guard. Tank of this fight.
Emantha - consume darkness then guard, there is no way she can fun out of MP in this fight.
Amiel - heal then guard then gather energy if you run out of MP, she will be the one dying the most.
Teira - wild slashes or guard. Main damage dealer of this fight, but she will die nearly as often as Amiel.
Use items as needed (you will need them all). If you can, use shadow potions only on Atreyan (these are revive ones) and elixir on him or Amiel. Glimmers should go to Teira, or eventually, Emantha. Also, try to use them first, to use skills. Potions can go wherever they are needed.
As for equpment prioritize M.defence to the point of surviving 1 AoE with everone. Moreso with Atreyan and Emantha.
After that just pray that it will use single target attack on Atreyan as often as possible.
Game is pretty long and repetitive, a lot of grinding for potions and stuff as you do not earn money from battles, even if you could, you can't buy potions. The time loop thing was done pretty good, I liked the story in it and the sex scenes were alright. Here is a save if anyone needs it:
Grind for potions? You don't even need them before security minibosses, if caught unprepared, or your clones if you are. I Do agree that most of random encounters are pointless, though.