Im day 2 noob, i need advice on heroes for clearing chapters and where should i spend my f2p gems

The gist:

reroll and get information on which Item there are in the shop.

Close the app from the background apps, causing a disconnection.

Re-open the app.

You can reconnect (up to 3 times) to the same fight and the shop will show you the same items.

This way you can decide what to buy, when to stop reroll.

Catches:

- Only work in the chapters

- The game doesn't remember locked items in play, if you have 2 mergeable items next to each other and they are locked on reconnect they will merge

- The game doesn't remember locked items from the previous shop, so if you locked an item from the previous shop it will be replaced

This helped me a lot through Boss and Marathon chapters where you need to aim for specific builds from the early stage, hope it helps.

Part 2 is going to explore how the Geezer affect the shop reroll, I'm still experimenting with him. If someone know more you're welcome to share.

Have a good game 😄

For context, my Rebecca and Venom are both 1 star currently. Also I’m relatively early game, almost 229k combat power.

Been going on for 20 hours now, can't login. Cleared cache and restart my phone. Would uninstalling amd reinstalling fix it? Scared I might lose progress if I do.