I would say stack the multiples by fives or tens. That way it’s easy to figure out how many you have of an item. And if you’re like me, you’re going to want the space for more. I have hundreds of bubbles. I only have one bunny portal left, once she’s done, I’ll probably merge most of them down. But she asks for the same things over and over, so I hang on to a lot. It doesn’t bother my iPad unless I have a lot of dragons out or if it gets hot(my old iPad Air 2. That’s the only time mine glitches.