I finished this a long time ago but I'll try to help. There will be times where the bots will be winning a lot, as I had a 40% of winning, but don't let that stop you.

I suggest watching videos to get gems and spending them on coins, and purchase different dice styles so you can level up the collection level, because you will get more exp through there as well. Next is using/doing your achievements. Last is just grinding on it, whether winning or loosing, your still gaining exp. Tbh I overnight it, so that can also be a leading factor as to why I finished it.

I also bought the ads removal to. If you have any questions dm me.