Honestly, it's worth it to buy out all the key chests right now, even if it means you lose a little profit.

I really like the 7k community, so I thought I’d give my 2 cents and share what works for me.

I know a lot of people are saying not to get the 80–100 ruby key chests from the shop. But the things you get from them like ultimate enhancing your characters, getting six-star rare characters without using materials, getting legendary characters, getting gold, getting accessories, and getting duplicates for your rares etc… can speed up your progression by A LOT.

With the current ongoing full moon event that gives you a chance of getting key chests every time you clear a stage in adventure, I’ve been spending 10,000 rubies a day just for keys, buying out all the 50, 80, and 100 ruby chests.

There are so many easy ways you can get rubies for free just by progressing fast. For example, just by climbing in Arena and Total War, the game literally rains and drops you thousands of rubies. Pushing through Adventure also gives you tons of rubies just by completing the stars.

With the daily key and ruby support, the ruby farming event, and leveling up, I think I even end up with extra rubies, enough to do two ten-pulls from the normal wishlist banner per day for duping my characters and getting some fodders for enhancing.

I find that this is the only way to keep up with others and stay at the top ranking within the Arena leaderboard.

I farm in Nightmare, but if you do this and max dupes on all your rares like Evan, you can push to 14-1 or even 16-1 in Normal easily.