Yeah, that's something I was struggling with coming up with a solution for, since at later stages if you get a bad matchup when an enemy spawns, it's kinda over. I opted for making some decently strong defensive items, and also the break ability, but it doesn't really fix the problem. There's actually 3 items in the game that have abilities that can change your next turn to be a certain damage type too, but all this just goes to show how I don't actually think of the best solution lol.
Anyways, thanks for playing.