Everyone has some reasons to prefer one browser over another. Your overall experience helps, but you could help us help you by breaking down your questions into problems we can solve.
Let me start with the “Account” browser.
How are you comparing battery life between browsers and how important is this for “Account” use.
What functionality issues have you had with the browsers? Related to again Account use.
My real life use with Windows is testing on a laptop, and desktop which has Windows only software not related to a web browser, so battery life is not something I monitor.
My browser for account specific use is Brave Mobile on Android.