Can anyone give me some helpful hints how to do better in Idle Battle Royale?

https://www.quora.com/What-games-can-you-only-win-by-not-playing#:~:text=What%20%27games%27%20can%20you%20only,win%20by%20not%20playing%3F%20-%20Quora&text=The%20first%20that%20comes%20to,it%20says%20nothing%20is%20there.

What is your current strategy, and where does that go wrong?

Getting attack hurts, so try to hang low, and then suddenly complete the level in a few seconds before anyone can react.
A combo of Supercharge Armycamp and TimeWarp artifacts works really good for this. (Play the SA before the TW...)