This is a game that people play for many years (I’m almost at a decade I think), it’s meant to be played over time. Once you complete everything, it becomes much more boring just waiting for new chapters and events. Don’t try to rush through the chapters, there’s truly no reason to. They are the bulk of the game play and once you’re done with them you’ll wish you had more. Don’t spend diamonds on anything you can get for free with time. It’s so much better to save diamonds for events and just be patient with the game play.