Permadeath should be in Normal, you can remove it in Story Mode.
Scrolls of Revivify should only be usable by Clerics, Paladins and Druids - and should still cost 300g on cast, and should have a DC15 Wisdom Check if you do not have access to level 3 spells yet.
Absolutely fucking not to all of that.
Do you know how many posts I see going "I rely entirely on autosaves and never save at all, and now I've lost hours of progress"? Players can be dumb, and it is an extremely bad idea to force all players in "Normal" difficulty or higher into Iron Man, "no mistakes" mode.
The party is limited to 4, and there's likely to be only one of Cleric, Paladin, or Druid, and if they're the ones that died, what do to then, exactly?
Permadeath works in tabletop where the dead player can come back in at the next tavern with a different, exciting backstory. Here, at best you can replace an interesting origin with a generic silent mercenary.
Your idea is terrible for a videogame.
