Just a few days ago I began to use a modified version of the Standard Comic Script format by Steenz for Caltonia's script, and it makes the process much better!
All I really need is the page number and the setting. I won't have to worry about an accurate panel number until I get around to thumbning pages, but I like to have an idea of what to expect.
I script my comics in Obsidian, which I've talked about before but it's a note taking program/app whose format is in markdown and your files are stored locally! I've enjoyed using it for the past few months and I hope I can for years to come!