I've managed to scrape by on most of the battles even when the party has 10% HP because the game crashes after releasing a tap on food in the camp.
I had only a single instance where I went to a quest, managed to eat and didn't crash. I don't know how it happened,only that I was under prepped for the boss.
Now I'm in a quest where I have to cross the jungle to reach further past it and the HP drain from the rain is too harsh and I can't beat this area, hence the game is unbeatable unless the crash is resolved.